Import test refactor for subnets

[ryndaniels]

Community Note

• Please vote on this pull request by adding a 👍 reaction to the original pull request comment to help the community and maintainers prioritize this request
• Please do not leave "+1" comments, they generate extra noise for pull request followers and do not help prioritize the request

Relates #8944

Release note for CHANGELOG:

NONE

Output from acceptance testing:

$ make testacc TESTARGS="-run=TestAccAWSSubnet"
==> Checking that code complies with gofmt requirements...
TF_ACC=1 go test ./... -v -parallel 20 -run=TestAccAWSSubnet -timeout 120m
?       github.com/terraform-providers/terraform-provider-aws   [no test files]
=== RUN   TestAccAWSSubnet_basic
=== PAUSE TestAccAWSSubnet_basic
=== RUN   TestAccAWSSubnet_ipv6
=== PAUSE TestAccAWSSubnet_ipv6
=== RUN   TestAccAWSSubnet_enableIpv6
=== PAUSE TestAccAWSSubnet_enableIpv6
=== RUN   TestAccAWSSubnet_availabilityZoneId
=== PAUSE TestAccAWSSubnet_availabilityZoneId
=== CONT  TestAccAWSSubnet_basic
=== CONT  TestAccAWSSubnet_availabilityZoneId
=== CONT  TestAccAWSSubnet_ipv6
=== CONT  TestAccAWSSubnet_enableIpv6
--- PASS: TestAccAWSSubnet_availabilityZoneId (54.11s)
--- PASS: TestAccAWSSubnet_basic (55.55s)
--- PASS: TestAccAWSSubnet_enableIpv6 (90.81s)
--- PASS: TestAccAWSSubnet_ipv6 (144.64s)
PASS
ok      github.com/terraform-providers/terraform-provider-aws/aws       149.395s

[bflad]

LGTM 🚀

--- PASS: TestAccAWSSubnet_availabilityZoneId (10.52s)
--- PASS: TestAccAWSSubnet_basic (10.67s)
--- PASS: TestAccAWSSubnet_enableIpv6 (17.15s)
--- PASS: TestAccAWSSubnet_ipv6 (25.83s)

[ghost]

This has been released in version 2.27.0 of the Terraform AWS provider. Please see the Terraform documentation on provider versioning or reach out if you need any assistance upgrading.

For further feature requests or bug reports with this functionality, please create a new GitHub issue following the template for triage. Thanks!

[ghost]

I'm going to lock this issue because it has been closed for 30 days ⏳. This helps our maintainers find and focus on the active issues.

If you feel this issue should be reopened, we encourage creating a new issue linking back to this one for added context. Thanks!