feat: Support Db2 CloudWatch log exports for aws_db_instance

[acwwat]

Description

This PR adds support for the Db2-specific values, diag.log and notify.log for the enabled_cloudwatch_logs_exports attribute of the aws-db-instance resource.

Relations

Closes #35611

References

Referenced CreateDBInstance API doc for the Db2 CloudWatch log export values/

Output from Acceptance Testing

$ export RDS_DB2_CUSTOMER_ID=111111

$ export RDS_DB2_SITE_ID=1111111

$ make testacc TESTS=TestAccRDSInstance_EnabledCloudWatchLogsExports_db2 PKG=rds
==> Checking that code complies with gofmt requirements...
TF_ACC=1 go test ./internal/service/rds/... -v -count 1 -parallel 20 -run='TestAccRDSInstance_EnabledCloudWatchLogsExports_db2'  -timeout 360m
=== RUN   TestAccRDSInstance_EnabledCloudWatchLogsExports_db2
=== PAUSE TestAccRDSInstance_EnabledCloudWatchLogsExports_db2
=== CONT  TestAccRDSInstance_EnabledCloudWatchLogsExports_db2
--- PASS: TestAccRDSInstance_EnabledCloudWatchLogsExports_db2 (1311.49s)
PASS
ok      github.com/hashicorp/terraform-provider-aws/internal/service/rds        1311.654s

$

[github-actions]

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[ewbankkit]

LGTM 🚀.

[ewbankkit]

@acwwat Thanks for the contribution 🎉 👏.

[github-actions]

This functionality has been released in v5.36.0 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]

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