feat(lambda-python): add local bundling option

[polothy]

Docker bundling is slow, but sometimes necessary. This just gives the end user the option to bundle locally if they want to, but still have the option to fallback to the Docker bundling.

Related to #18290 - but I'm not sure if it closes it.

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[gitpod-io]

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[polothy]

EDIT: I got something working - I ran it in us-east-1.

I got as far as running yarn integ --update-on-failed test/integ.function.js but I got worried about that it was doing to the AWS account and Ctr-C'ed out.

Running in parallel across regions: us-east-1, us-east-2, us-west-2

I don't have all those regions bootstrapped either.

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

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• CodeBuild project: AutoBuildv2Project1C6BFA3F-wQm2hXv2jqQv
• Commit ID: 75b214b
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[corymhall]

@polothy thanks for getting this started! For the python local bundling feature we need to provide the bundling logic rather than expecting the user to provide it. Something like what is done with the lambda-nodejs construct.

[polothy]

I wasn't planning to take this PR that far. We can close it.