[llvm] [RISCV][GlobalISel] Select G_ICMP, G_LOAD, G_STORE, G_ZEXTLOAD (PR #67619)

[Craig Topper via llvm-commits]

https://github.com/topperc requested changes to this pull request.

Need store patterns for from s32 on rv64

https://github.com/llvm/llvm-project/pull/67619