[llvm-branch-commits] [RISCV] Port PreAllocZilsdOpt to NewPM (PR #235513)

[Aiden Grossman via llvm-branch-commits]

https://github.com/boomanaiden154 created https://github.com/llvm/llvm-project/pull/235513

Standard NewPM pass porting. Also rename the pass name to match the
class name.