fix(lambda-python-alpha): pass architecture property to function

[mapk-amazon]

By default Lambda will take x86 architecture, which might get into conflict with layers/code. With this change the architecture information is passed along and the correct architecture for the docker image is chosen.

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• CodeBuild project: AutoBuildv2Project1C6BFA3F-wQm2hXv2jqQv
• Commit ID: 98820ac
• Result: SUCCEEDED
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[kaizencc]

Thanks @mapk-amazon, we need a unit test to go along with this change to ensure that it works. Are you up for that?

[kaizencc]

Superseded by #28449

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