[llvm] [SPIR-V] Implement SPV_KHR_float_controls2 (PR #146941)

[Marcos Maronas via llvm-commits]

maarquitos14 wrote:

The failed test is known, and caused by an update to spirv-val: https://github.com/llvm/llvm-project/pull/144774#issuecomment-3028441320, and is unrelated to this change.

https://github.com/llvm/llvm-project/pull/146941