[llvm] [NewPM][CodeGen] Refactoring CodeGenPassBuilder (PR #89708)

[via llvm-commits]

paperchalice wrote:

I plan to revisit this pull request after I touched some codes in asm printer and register allocator.
Register allocator part should be customizable, there are several ad hoc pass insertions in some targets.
If possible, we can move some functions to `PassBuilder` e.g. `createAsmPrinter` and `createMCStreamer` without cyclic dependency.

https://github.com/llvm/llvm-project/pull/89708