Migrate TGW Route Table to AWS SDK v2

[sc250024]

Description

Fixes #770. These commits are cherry-picked from my other PR here: #800

TODOs

Read the Gruntwork contribution guidelines.

• Update the docs.
• Run the relevant tests successfully, including pre-commit checks.
• Ensure any 3rd party code adheres with our license policy or delete this line if its not applicable.
• Include release notes. If this PR is backward incompatible, include a migration guide.
• Attention Grunts - if this PR adds support for a new resource, ensure the nuke_sandbox and nuke_phxdevops jobs in .circleci/config.yml have been updated with appropriate exclusions (either directly in the job or via the .circleci/nuke_config.yml file) to prevent nuking IAM roles, groups, resources, etc that are important for the test accounts.

Release Notes (draft)

Updated transit-gateway-route-table to AWS SDK v2

[sc250024]

CC @james03160927

[sc250024]

Results from local testing:

❯ git rev-parse HEAD
c9c6043691a7b966d4216656720dde7efe7e953b

❯ go test -count=1 -parallel=10 -run "TestTransitGatewayRouteTables*" ./...
?   	github.com/gruntwork-io/cloud-nuke	[no test files]
?   	github.com/gruntwork-io/cloud-nuke/externalcreds	[no test files]
?   	github.com/gruntwork-io/cloud-nuke/logging	[no test files]
?   	github.com/gruntwork-io/cloud-nuke/telemetry	[no test files]
?   	github.com/gruntwork-io/cloud-nuke/v2_migration_report	[no test files]
ok  	github.com/gruntwork-io/cloud-nuke/aws	0.578s [no tests to run]
ok  	github.com/gruntwork-io/cloud-nuke/aws/resources	0.630s
ok  	github.com/gruntwork-io/cloud-nuke/commands	0.903s [no tests to run]
ok  	github.com/gruntwork-io/cloud-nuke/config	1.083s [no tests to run]
ok  	github.com/gruntwork-io/cloud-nuke/report	1.464s [no tests to run]
ok  	github.com/gruntwork-io/cloud-nuke/ui	1.288s [no tests to run]
ok  	github.com/gruntwork-io/cloud-nuke/util	1.660s [no tests to run]

[james03160927]

LGTM