chore(ecs): update instance-drain-hook lambda runtime to python 3.13 (closes #34634)

[its-felix]

Issue # (if applicable)

Closes #34634.

Reason for this change

The old Lambda Runtime Python 3.9 is being deprecated

Description of changes

• Update Lambda Runtime to Python 3.13 (newest currently supported)
  • Python 3.13 is supported in All Regions (https://aws.amazon.com/about-aws/whats-new/2024/11/aws-lambda-support-python-313)
  • The function code is very basic. All syntax and standard library functions used by the code continue to work in 3.13
• Fixed a minor logging bug in the lambda code
• Added Runtime-Property assertion to unit tests
• Updated Runtime-Property assertion in integ tests

Describe any new or updated permissions being added

None

Description of how you validated changes

(cd packages/aws-cdk-lib && yarn test aws-ecs)

Checklist

• [x] My code adheres to the CONTRIBUTING GUIDE and DESIGN GUIDELINES

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By submitting this pull request, I confirm that my contribution is made under the terms of the Apache-2.0 license

[aws-cdk-automation]

AWS CodeBuild CI Report

• CodeBuild project: AutoBuildv2Project1C6BFA3F-wQm2hXv2jqQv
• Commit ID: 029c12508662548364dbb51d3b8a944abcfc1477
• Result: FAILED
• Build Logs (available for 30 days)

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[Abogical]

Closed in favour of #35103

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