chore(lambda-nodejs): update integration test for bundling

[shikha372]

Issue # (if applicable)

Closes #NA.

Reason for this change

Plan to change default user to a be non-root for bundling process.

Description of changes

• Added integration test for all packages that use dockerfile for bundling and will be affected with further changes.
• Added bootstrap file binary to be identified as an LFS under .gitattribute
• Updated contributing guide to let users know that git lfs install is needed to handle large file changes.

Describe any new or updated permissions being added

NA

Description of how you validated changes

yarn build
yarn integ

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

[aws-cdk-automation]

(This review is outdated)

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 82.37%. Comparing base (759e692) to head (03ff974).
Report is 1 commits behind head on main.

Additional details and impacted files

@@           Coverage Diff           @@
##             main   #33679   +/-   ##
=======================================
  Coverage   82.37%   82.37%           
=======================================
  Files         120      120           
  Lines        6933     6933           
  Branches     1169     1169           
=======================================
  Hits         5711     5711           
  Misses       1119     1119           
  Partials      103      103           

Flag	Coverage Δ
suite.unit	82.37% <ø> (ø)

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Components	Coverage Δ
packages/aws-cdk	∅ <ø> (∅)
packages/aws-cdk-lib/core	82.37% <ø> (ø)

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✅ Updated pull request passes all PRLinter validations. Dismissing previous PRLinter review.

[aws-cdk-automation]

AWS CodeBuild CI Report

• CodeBuild project: AutoBuildv2Project1C6BFA3F-wQm2hXv2jqQv
• Commit ID: 03ff974
• Result: SUCCEEDED
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