Fix Mono Windows x64 SIMD support. #46812
Merged
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Mono Windows x64 SIMD support was not fully implemented on netcore causing issues reported in #1933. PR integrate logic from Mono Windows x64 SIMD implementation into Mono netcore SIMD implementation needed to correctly handle Windows x64 value type ABI together with SIMD intrinsics.
PR also re-enables SIMD optimization on Windows x64.