[llvm] [NVPTX] support packed f32 instructions for sm_100+ (PR #126337)

[Adrian Kuegel via llvm-commits]

akuegel wrote:

@Prince781 We have a reproducer for a crash when lowering to PTX. I have attached it here. It works fine when v2f32 is disabled (i.e. without the changes from this PR). Can you please take a look?
[reproducer.ll.txt](https://github.com/user-attachments/files/21655779/reproducer.ll.txt)


https://github.com/llvm/llvm-project/pull/126337