Feature- Lambda Layer Alias

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**Description**
Lambda Layers have hard coded version numbers. Sometimes I want to use an alias to point to a newer version of a layer. Please release lambda layer alias so I can move several functions at one time to a new lambda layer.

**Additional context**
N/A

The issue mentions no repository files, tests, or entry points. Start by clarifying the expected Lambda Layer alias behavior and scope with maintainers, then identify the affected implementation and tests. Done should include an agreed design and verified support for moving functions between layer versions through an alias.

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