[llvm] [X86] Fix wrong RIP-relative relocations for AVX10.2 saturation conversions (PR #185254)

[Fangrui Song via llvm-commits]

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MaskRay wrote:

Thank you for the command! `ExeDomain` values were changed to `Generic`Domain` and I've fixed them now. I think the values are not covered by any test.

https://github.com/llvm/llvm-project/pull/185254