Fix(build): e2e workflow failing

[dreamorosi]

Description of your changes

As described in #1046 there is a small bug in the newly introduced layer job that is now part (#826) of the e2e tests.

The issue was caused by the fact that the e2e tests for this part of the codebase required code in the packages/commons folder. The dependencies for that packages were not being installed causing the run to fail.

After fixing the issue I then found out two more issues:

• The workflow uses the matrix strategy to run the e2e tests on multiple NodeJS versions. There was a resource in the tested stack (an SSM Param) for which the name was not unique making 2/3 versions of the matrix fail automatically. I have added a suffix with the NodeJS version being tested to make the name unique.
• The workflow deploys a Lambda function that is used to test the correctness of the Lambda Layer being tested. That function imports the Powertools utilities. Since the utils are expected to be in the layer, they are not installed (npm i) as part of the setup process. This was however causing the esbuild process to fail because they were not marked as external. Marking a dependency as external tells CDK & esbuild to not bundle said dependency since it's expected to be present in the Lambda environment.

This PR aims at fixing all three issues mentioned above.

How to verify this change

See this cool badge for the e2e test results for this branch:

Related issues, RFCs

Issue number: #1046

PR status

Is this ready for review?: YES
Is it a breaking change?: NO

Checklist

• My changes meet the tenets criteria
• I have performed a self-review of my own code
• I have commented my code where necessary, particularly in areas that should be flagged with a TODO, or hard-to-understand areas
• My changes generate no new warnings
• The code coverage hasn't decreased
• I have added tests that prove my change is effective and works
• New and existing unit tests pass locally and in Github Actions
• The PR title follows the conventional commit semantics

Breaking change checklist

N/A

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[flochaz]

YOU ROCK!

[saragerion]

Thanks for the house keeping!

[saragerion]

Nice