[clang] [llvm] [RISCV] Remove experimental from Vector Crypto extensions (PR #74213)

[Craig Topper via cfe-commits]

topperc wrote:

@ebiggers are you table to commit or do you need someone else to do it? I don't recall seeing a commit from you before so I wasn't sure.

https://github.com/llvm/llvm-project/pull/74213