[clang] [CodeGen] Do not emit call site attributes for LLVM intrinsics. (PR #116881)

[Eli Friedman via cfe-commits]

efriedma-quic wrote:

Accessing intrinsics using `asm` is not a documented feature; it's an unintended result of the name clash between functions and LLVM intrinsics.  And I'm a little hesitant about making it a real feature; there are other calling convention issues, and IR changes can very easily break "working" code by accident.

https://github.com/llvm/llvm-project/pull/116881