[llvm] [NVPTX] pull in v2i32 build_vector through v2f32 bitcast (PR #153478)

[Princeton Ferro via llvm-commits]

Prince781 wrote:

Looks like CI is red because of a broken Arm/Thumb2 test, but this shouldn't have anything to do with this change.

https://github.com/llvm/llvm-project/pull/153478