[clang] [CIR][X86] Implement lowering for sqrt builtins (PR #169310)

[Priyanshu Kumar via cfe-commits]

Priyanshu3820 wrote:

@andykaylor Apologies for the noise - I had some git issues that accidentally included unrelated LLVM changes, which triggered auto-assignment of many reviewers. The PR is now cleaned up with only the `sqrt` builtin implementation. Could you help remove the extra reviewers? Only the original CIR reviewers should remain. Thanks!

https://github.com/llvm/llvm-project/pull/169310