[llvm] [RISCV] Separate doLocalPostpass into new pass and move to post vector regalloc (PR #88295)

[Luke Lau via llvm-commits]

lukel97 wrote:

I'm planning on reverting this by the way, there's an address sanitizer failure on one of the buildbots. 

https://github.com/llvm/llvm-project/pull/88295