[llvm] [SPIRV]Added support for extension SPV_INTEL_arbitrary_precision_fixed_point (PR #136085)

[Dmitry Sidorov via llvm-commits]

https://github.com/MrSidims commented:

Thank you for the contribution! There are few nits, other than that the patch is LGTM.

I have one logistical question though, @bashbaug I see this extensions (as well as few others) moved into Altera folder in SPIR-V Registry. Are there plans to rename the extensions themselves?

https://github.com/llvm/llvm-project/pull/136085