Investigate if we need to bundle the whole layer

[msonnb]

We currently bundle the CJS lambda layer into a single file. Investigate whether this is necessary or if we can reuse dependencies for the ESM layer in order to reduce total layer size.

[github-actions]

A PR closing this issue has just been released 🚀

This issue was referenced by PR #17012, which was included in the 10.0.0 release.