[clang] [llvm] [RISCV] Add Zilsd and Zclsd Extensions (PR #131094)

[via llvm-commits]

dong-miao wrote:

When I tested with `sudo ninja - C build check lvm` locally, there were two testing errors that I couldn't solve.  For rv32zclsd-valid. s, errors may occur during the disassembly process because the test file does not report errors when I remove Check-ASM-AND-OBJ.
[Error record.txt](https://github.com/user-attachments/files/19243231/Error.record.txt)


https://github.com/llvm/llvm-project/pull/131094