Deployment from arm64 Linux vendors arm64 dependencies

It appears that deploying from arm64 Linux results in downloading of arm64 wheels when they exist (e.g. pandas). These don't work on an x86_64 lambda function (the default architecture), causing difficult-to-debug execution failure.

This is different from https://github.com/aws/chalice/issues/1808, but I imagine would probably be fixed by it.

https://github.com/aws/chalice/issues/1700 is also related.

Start by comparing this report with issues 1808 and 1700, then trace how deployment from arm64 Linux selects dependencies for the default x86_64 Lambda architecture. Done means an arm64 deployment does not package incompatible arm64 wheels for an x86_64 Lambda function, with the relevant deployment behavior covered by tests.

Written by the indexing model from the issue text.