Backmerging Module Federation v2

Feature request

This is a tracking issue for various pieces of work to backmerge some of the advances in module federation 2 back into webpack core.

• Reference Hoisting: https://github.com/webpack/webpack/issues/18810
• Remove Mandatory import() + support splitChunks: all: https://github.com/webpack/webpack/issues/18812

What is the expected behavior?

What is motivation or use case for adding/changing the behavior? I want to sync these changes into rspack and want to reduce the number of patches i must maintain in my plugin that fix "bugs in webpack"

How should this be implemented in your opinion? TBD

Are you willing to work on this yourself? yes, but I will need contributor help - i have taken it about as far as i know how to.