[clang] [llvm] [NVPTX] Remove nvvm.bitcast.* intrinsics (PR #107936)

[Justin Fargnoli via cfe-commits]

justinfargnoli wrote:

> can you point me to an analogous change I could use as an example?

[[LLD] Add CLASS syntax to SECTIONS](https://github.com/llvm/llvm-project/commit/7e8a9020b1ae3dea28c19f0cd68743482dca13d9#diff-96d3595c06280d8c10f2687758a9e7bb5a0f3552fd53e552a1490411870c3500)
[[LLVM] Add IRNormalizer Pass](https://github.com/llvm/llvm-project/pull/68176/files#diff-a7085286edacbd0cdfabdd7382565889ff52dc9013a847d960d148ff4ad2eff8)

https://github.com/llvm/llvm-project/pull/107936