Revert "Rename KMS key for sechub"

[richgreen-moj]

Reverts #635
I'm going to try using name_prefix instead as it will add a unique ID to the name.

[github-actions]

Trivy Scan Success

Show Output

```hcl

---

Trivy will check the following folders:
modules/securityhub
test/securityhub-test

---

Running Trivy in modules/securityhub
2024-10-23T17:06:14Z INFO [vulndb] Need to update DB
2024-10-23T17:06:14Z INFO [vulndb] Downloading vulnerability DB...
2024-10-23T17:06:14Z INFO [vulndb] Downloading artifact... repo="ghcr.io/aquasecurity/trivy-db:2"
2024-10-23T17:06:16Z INFO [vulndb] Artifact successfully downloaded repo="ghcr.io/aquasecurity/trivy-db:2"
2024-10-23T17:06:16Z INFO [vuln] Vulnerability scanning is enabled
2024-10-23T17:06:16Z INFO [misconfig] Misconfiguration scanning is enabled
2024-10-23T17:06:16Z INFO [misconfig] Need to update the built-in checks
2024-10-23T17:06:16Z INFO [misconfig] Downloading the built-in checks...
2024-10-23T17:06:16Z ERROR [misconfig] Falling back to embedded checks err="failed to download built-in policies: download error: OCI repository error: 1 error occurred:\n\t* GET https://ghcr.io/v2/aquasecurity/trivy-checks/manifests/1: TOOMANYREQUESTS: retry-after: 71.346µs, allowed: 44000/minute\n\n"
2024-10-23T17:06:16Z INFO [secret] Secret scanning is enabled
2024-10-23T17:06:16Z INFO [secret] If your scanning is slow, please try '--scanners vuln' to disable secret scanning
2024-10-23T17:06:16Z INFO [secret] Please see also https://aquasecurity.github.io/trivy/v0.56/docs/scanner/secret#recommendation for faster secret detection
2024-10-23T17:06:17Z INFO [terraform scanner] Scanning root module file_path="."
2024-10-23T17:06:17Z INFO Number of language-specific files num=0
2024-10-23T17:06:17Z INFO Detected config files num=1
trivy_exitcode=0

---

Running Trivy in test/securityhub-test
2024-10-23T17:06:17Z INFO [vuln] Vulnerability scanning is enabled
2024-10-23T17:06:17Z INFO [misconfig] Misconfiguration scanning is enabled
2024-10-23T17:06:17Z INFO [misconfig] Need to update the built-in checks
2024-10-23T17:06:17Z INFO [misconfig] Downloading the built-in checks...
156.02 KiB / 156.02 KiB [---------------------------------------------------------] 100.00% ? p/s 0s2024-10-23T17:06:17Z INFO [secret] Secret scanning is enabled
2024-10-23T17:06:17Z INFO [secret] If your scanning is slow, please try '--scanners vuln' to disable secret scanning
2024-10-23T17:06:17Z INFO [secret] Please see also https://aquasecurity.github.io/trivy/v0.56/docs/scanner/secret#recommendation for faster secret detection
2024-10-23T17:06:18Z INFO [terraform scanner] Scanning root module file_path="."
2024-10-23T17:06:18Z INFO Number of language-specific files num=0
2024-10-23T17:06:18Z INFO Detected config files num=1
trivy_exitcode=0

</details> #### `Checkov Scan` Success
<details><summary>Show Output</summary>

```hcl

*****************************

Checkov will check the following folders:
modules/securityhub
test/securityhub-test

*****************************

Running Checkov in modules/securityhub
Excluding the following checks: CKV_GIT_1,CKV_AWS_126,CKV2_AWS_38,CKV2_AWS_39
2024-10-23 17:06:21,299 [MainThread  ] [WARNI]  Failed to download module github.com/ministryofjustice/modernisation-platform-terraform-pagerduty-integration?ref=0179859e6fafc567843cd55c0b05d325d5012dc4:None (for external modules, the --download-external-modules flag is required)
terraform scan results:

Passed checks: 26, Failed checks: 0, Skipped checks: 3


checkov_exitcode=0

*****************************

Running Checkov in test/securityhub-test
Excluding the following checks: CKV_GIT_1,CKV_AWS_126,CKV2_AWS_38,CKV2_AWS_39
terraform scan results:

Passed checks: 28, Failed checks: 0, Skipped checks: 3


checkov_exitcode=0

CTFLint Scan Success

Show Output

*****************************

Setting default tflint config...
Running tflint --init...
Installing "terraform" plugin...
Installed "terraform" (source: github.com/terraform-linters/tflint-ruleset-terraform, version: 0.9.1)
tflint will check the following folders:
modules/securityhub
test/securityhub-test

*****************************

Running tflint in modules/securityhub
Excluding the following checks: terraform_unused_declarations
tflint_exitcode=0

*****************************

Running tflint in test/securityhub-test
Excluding the following checks: terraform_unused_declarations
tflint_exitcode=0

Trivy Scan Success

Show Output

*****************************

Trivy will check the following folders:
modules/securityhub
test/securityhub-test

*****************************

Running Trivy in modules/securityhub
2024-10-23T17:06:14Z	INFO	[vulndb] Need to update DB
2024-10-23T17:06:14Z	INFO	[vulndb] Downloading vulnerability DB...
2024-10-23T17:06:14Z	INFO	[vulndb] Downloading artifact...	repo="ghcr.io/aquasecurity/trivy-db:2"
2024-10-23T17:06:16Z	INFO	[vulndb] Artifact successfully downloaded	repo="ghcr.io/aquasecurity/trivy-db:2"
2024-10-23T17:06:16Z	INFO	[vuln] Vulnerability scanning is enabled
2024-10-23T17:06:16Z	INFO	[misconfig] Misconfiguration scanning is enabled
2024-10-23T17:06:16Z	INFO	[misconfig] Need to update the built-in checks
2024-10-23T17:06:16Z	INFO	[misconfig] Downloading the built-in checks...
2024-10-23T17:06:16Z	ERROR	[misconfig] Falling back to embedded checks	err="failed to download built-in policies: download error: OCI repository error: 1 error occurred:\n\t* GET https://ghcr.io/v2/aquasecurity/trivy-checks/manifests/1: TOOMANYREQUESTS: retry-after: 71.346µs, allowed: 44000/minute\n\n"
2024-10-23T17:06:16Z	INFO	[secret] Secret scanning is enabled
2024-10-23T17:06:16Z	INFO	[secret] If your scanning is slow, please try '--scanners vuln' to disable secret scanning
2024-10-23T17:06:16Z	INFO	[secret] Please see also https://aquasecurity.github.io/trivy/v0.56/docs/scanner/secret#recommendation for faster secret detection
2024-10-23T17:06:17Z	INFO	[terraform scanner] Scanning root module	file_path="."
2024-10-23T17:06:17Z	INFO	Number of language-specific files	num=0
2024-10-23T17:06:17Z	INFO	Detected config files	num=1
trivy_exitcode=0

*****************************

Running Trivy in test/securityhub-test
2024-10-23T17:06:17Z	INFO	[vuln] Vulnerability scanning is enabled
2024-10-23T17:06:17Z	INFO	[misconfig] Misconfiguration scanning is enabled
2024-10-23T17:06:17Z	INFO	[misconfig] Need to update the built-in checks
2024-10-23T17:06:17Z	INFO	[misconfig] Downloading the built-in checks...
156.02 KiB / 156.02 KiB [---------------------------------------------------------] 100.00% ? p/s 0s2024-10-23T17:06:17Z	INFO	[secret] Secret scanning is enabled
2024-10-23T17:06:17Z	INFO	[secret] If your scanning is slow, please try '--scanners vuln' to disable secret scanning
2024-10-23T17:06:17Z	INFO	[secret] Please see also https://aquasecurity.github.io/trivy/v0.56/docs/scanner/secret#recommendation for faster secret detection
2024-10-23T17:06:18Z	INFO	[terraform scanner] Scanning root module	file_path="."
2024-10-23T17:06:18Z	INFO	Number of language-specific files	num=0
2024-10-23T17:06:18Z	INFO	Detected config files	num=1
trivy_exitcode=0