[clang] [llvm] [RISC-V] Remove experimental for Zicfiss/Zicfilp. (PR #98891)

[Craig Topper via cfe-commits]

topperc wrote:

> Both of them are ratified.
https://wiki.riscv.org/display/HOME/Ratified+Extensions

Experimental is not the same not ratified. Moving an extension out of experimental should mean that the compiler generated code for a it is well tested and complete. Can you summarize the current state of Zicfilp and Zicfiss?

https://github.com/llvm/llvm-project/pull/98891