[clang] [Driver] Add riscv64-suse-linux triple (PR #74513)

[Fangrui Song via cfe-commits]

MaskRay wrote:

Sorry for causing you trouble but I think removing special cases from these `static const char *const XXXXXXXTriples[]` is intentional and we shall not add special cases for vendors. See https://github.com/llvm/llvm-project/issues/72256#issuecomment-1842148887

https://github.com/llvm/llvm-project/pull/74513