fix(lambda): validate localMountPath format and length

[exoego]

Issue # (if applicable)

Closes #17526

Reason for this change

Show user-friendly error message faster (before deployment)

Description of changes

Added format and length validation according to AWS::Lambda::Function FileSystemConfig document

Description of how you validated changes

Added unit test

Checklist

• 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

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[exoego]

❌ Fixes must contain a change to an integration test file and the resulting snapshot.

I think integration is overkill for this change.

[aws-cdk-automation]

This PR has been in the CHANGES REQUESTED state for 3 weeks, and looks abandoned. To keep this PR from being closed, please continue work on it. If not, it will automatically be closed in a week.

[exoego]

@aws-cdk-automation I am waiting maintainers to review

[aws-cdk-automation]

The pull request linter fails with the following errors:

❌ Fixes must contain a change to an integration test file and the resulting snapshot.

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AWS CodeBuild CI Report

• CodeBuild project: AutoBuildv2Project1C6BFA3F-wQm2hXv2jqQv
• Commit ID: 9f45642
• Result: SUCCEEDED
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[aws-cdk-automation]

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[aws-cdk-automation]

The pull request linter fails with the following errors:

❌ Fixes must contain a change to an integration test file and the resulting snapshot.

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