[lld] [lld][ELF][RISCV] Add Zcmt table-jump relaxation support (PR #206338)

[Ying Chen via llvm-commits]

punkyc wrote:

> @punkyc ,any plans to upstream the changes ?..

Thanks for checking in! This PR is the upstream submission and is currently ready for review. I’m waiting for reviewer/maintainer feedback and will address any comments or update the patch as needed. Reviews would be very welcome.

https://github.com/llvm/llvm-project/pull/206338