chore(lambda): add AWS_DEFAULT_REGION to the list of reserved environment variables

[sakurai-ryo]

Changes

• added AWS_DEFAULT_REGION to reservedEnvironmentVariables
  • unit tests were not added because there is only one existing test case written.

    • aws-cdk/packages/aws-cdk-lib/aws-lambda/test/function.test.ts

      Line 3426 in 91a3e8c

      test('function using a reserved environment variable', () => {

Description

The Function constructor checks that reserved environment variables are not specified when adding environment variables.
However, when I mistakenly specified AWS_DEFAULT_REGION as an environment variable, cdk synth did not generate an error.

The following document contains the list of reserved environment variables.
https://docs.aws.amazon.com/lambda/latest/dg/configuration-envvars.html#configuration-envvars-runtime

Cloudformation gives the following error.
Resource handler returned message: "Lambda was unable to configure your environment variables because the environment variables you have provided contains reserved keys that are currently not supported for modification. Reserved keys used in this request: AWS_DEFAULT_REGION

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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

[vinayak-kukreja]

Hey thank you for contributing this to the repository. Really appreciate it.

[mergify]

Thank you for contributing! Your pull request will be updated from main and then merged automatically (do not update manually, and be sure to allow changes to be pushed to your fork).

[aws-cdk-automation]

AWS CodeBuild CI Report

• CodeBuild project: AutoBuildv2Project1C6BFA3F-wQm2hXv2jqQv
• Commit ID: f31e90e
• Result: SUCCEEDED
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[mergify]

Thank you for contributing! Your pull request will be updated from main and then merged automatically (do not update manually, and be sure to allow changes to be pushed to your fork).