[clang] Recommit "[Clang][RISCV] Introduce tuple types for RVV bfloat16 #72216" (PR #72370)

[Yueh-Ting Chen via cfe-commits]

eopXD wrote:

@antmox The test case failure should be resolved with the latest commit. Its not any indeterminate result detected by CI, just that I missed an update to the test case that is expecting deterministic TypeID.

If CI passed, based on previous approval, should be good and safe to land it.

https://github.com/llvm/llvm-project/pull/72370