r/aws_ec2_serial_console_access: Add region argument

[ewbankkit]

Rollback Plan

If a change needs to be reverted, we will publish an updated version of the library.

Changes to Security Controls

Are there any changes to security controls (access controls, encryption, logging) in this pull request? If so, explain.

Description

Adds the missing region argument.
Requires resource identity schema migration.

As the resource can be imported, the undocumented id attribute changed from the AWS account ID to Region. I did not call this out in the CHANGELOG entry.

Relations

Closes #44250.
Relates #45023.

Output from Acceptance Testing

% make testacc TESTARGS='-run=TestAccEC2SerialConsoleAccess_serial' PKG=ec2   
make: Verifying source code with gofmt...
==> Checking that code complies with gofmt requirements...
make: Running acceptance tests on branch: 🌿 f-aws_ec2_serial_console_access-add-region 🌿...
TF_ACC=1 go1.24.10 test ./internal/service/ec2/... -v -count 1 -parallel 20  -run=TestAccEC2SerialConsoleAccess_serial -timeout 360m -vet=off
2025/11/13 11:46:11 Creating Terraform AWS Provider (SDKv2-style)...
2025/11/13 11:46:11 Initializing Terraform AWS Provider (SDKv2-style)...
=== RUN   TestAccEC2SerialConsoleAccess_serial
=== PAUSE TestAccEC2SerialConsoleAccess_serial
=== CONT  TestAccEC2SerialConsoleAccess_serial
=== RUN   TestAccEC2SerialConsoleAccess_serial/Resource
=== RUN   TestAccEC2SerialConsoleAccess_serial/Resource/basic
=== RUN   TestAccEC2SerialConsoleAccess_serial/Resource/Identity
=== RUN   TestAccEC2SerialConsoleAccess_serial/Resource/Identity/UpgradeNoRefresh
=== RUN   TestAccEC2SerialConsoleAccess_serial/Resource/Identity/basic
=== RUN   TestAccEC2SerialConsoleAccess_serial/Resource/Identity/ExistingResource
=== RUN   TestAccEC2SerialConsoleAccess_serial/Resource/Identity/ExistingResourceNoRefresh
=== RUN   TestAccEC2SerialConsoleAccess_serial/Resource/Identity/RegionOverride
=== RUN   TestAccEC2SerialConsoleAccess_serial/Resource/Identity/Upgrade
=== RUN   TestAccEC2SerialConsoleAccess_serial/DataSource
=== RUN   TestAccEC2SerialConsoleAccess_serial/DataSource/basic
--- PASS: TestAccEC2SerialConsoleAccess_serial (304.69s)
    --- PASS: TestAccEC2SerialConsoleAccess_serial/Resource (295.56s)
        --- PASS: TestAccEC2SerialConsoleAccess_serial/Resource/basic (23.56s)
        --- PASS: TestAccEC2SerialConsoleAccess_serial/Resource/Identity (272.00s)
            --- PASS: TestAccEC2SerialConsoleAccess_serial/Resource/Identity/UpgradeNoRefresh (47.66s)
            --- PASS: TestAccEC2SerialConsoleAccess_serial/Resource/Identity/basic (20.13s)
            --- PASS: TestAccEC2SerialConsoleAccess_serial/Resource/Identity/ExistingResource (78.25s)
            --- PASS: TestAccEC2SerialConsoleAccess_serial/Resource/Identity/ExistingResourceNoRefresh (42.83s)
            --- PASS: TestAccEC2SerialConsoleAccess_serial/Resource/Identity/RegionOverride (24.33s)
            --- PASS: TestAccEC2SerialConsoleAccess_serial/Resource/Identity/Upgrade (58.80s)
    --- PASS: TestAccEC2SerialConsoleAccess_serial/DataSource (9.13s)
        --- PASS: TestAccEC2SerialConsoleAccess_serial/DataSource/basic (9.13s)
PASS
ok  	github.com/hashicorp/terraform-provider-aws/internal/service/ec2	310.813s

[github-actions]

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[YakDriver]

LGTM 🎉

[github-actions]

Warning

This Issue has been closed, meaning that any additional comments are much easier for the maintainers to miss. Please assume that the maintainers will not see them.

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[github-actions]

This functionality has been released in v6.21.0 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. Thank you!

[github-actions]

I'm going to lock this pull request because it has been closed for 30 days ⏳. This helps our maintainers find and focus on the active issues.
If you have found a problem that seems related to this change, please open a new issue and complete the issue template so we can capture all the details necessary to investigate further.