[NewPM][CodeGen][llc] Add NPM support (#70922)
Add new pass manager support to `llc`. Users can use
`--passes=pass1,pass2...` to run mir passes, and use `--enable-new-pm`
to run default codegen pipeline.
This patch is taken from [D83612](https://reviews.llvm.org/D83612), the
original author is @yuanfang-chen.
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Co-authored-by: Yuanfang Chen <455423+yuanfang-chen@users.noreply.github.com>
