Add GFNI Intrinsics

[saucecontrol]

Fixes #96170

[dotnet-issue-labeler]

Note regarding the new-api-needs-documentation label:

This serves as a reminder for when your PR is modifying a ref *.cs file and adding/modifying public APIs, please make sure the API implementation in the src *.cs file is documented with triple slash comments, so the PR reviewers can sign off that change.

[dotnet-issue-labeler]

Note regarding the new-api-needs-documentation label:

This serves as a reminder for when your PR is modifying a ref *.cs file and adding/modifying public APIs, please make sure the API implementation in the src *.cs file is documented with triple slash comments, so the PR reviewers can sign off that change.

[saucecontrol]

This check wasn't really correct because it looks only at the cpuid bit and not the config knob. However, it doesn't matter anyway because if AVX512 is disabled, AVX10v1_V512 will be removed by implication in the call to EnsureValidInstructionSetSupport.

For simplicity and consistency with the other combo flags to come, I changed it to add the whole set as above, relying on the implications to do their job.

[tannergooding]

CC. @dotnet/jit-contrib for secondary review

-- The JIT format errors are notably unrelated and are under #109987 (comment)