Use Lambda runtime `al.2023` as base container to build Lambda functions

[amilochau]

Is your feature request related to a problem?

When building .NET applications with native AOT, we have to use the same operating system (with the same dependencies) as when used on runtime. Ubuntu 24 is not compatible is AWS Lambda runtime al.2023.

Describe the solution you'd like

We should use the AWS Lambda base container as the base container used by the GitHub Actions - so that we can continue using the latest version of the runner OS while building compatible Lambda functions.

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