Build: Always set EnhancedInstructionSet for AVX2

[TheLastRar]

Description of Changes

Replaces the march arguments for clang-cl with the msbuild EnhancedInstructionSet setting

Rationale behind Changes

Intellisense appears unable to infer AVX2 support from the additional march argument, instead relying on the value of EnableEnhancedInstructionSet

Suggested Testing Steps

Test performance in master and PR clang AVX2 builds

Test that non-AVX2 clang still supports none AVX2 systems (presumably it will)

[seta-san]

I know that’s a super specific situation, b we ut really, avx2 has been around since 2013. It’s basically 2025. I feel bad for the people who have ancient hardware but it’s really time to go full avx2

[JordanTheToaster]

Correction I am the dumb of ass and fat fingered a setting at some point that cut the FPS of my master build in half woops.

[rayanHappy]

I know that’s a super specific situation, b we ut really, avx2 has been around since 2013. It’s basically 2025. I feel bad for the people who have ancient hardware but it’s really time to go full avx2

Intel has been releasing CPUs that lack support for avx2 until at least 2021. Also you consider hardware from 2013 ancient !

[Valtekken]

I know that’s a super specific situation, b we ut really, avx2 has been around since 2013. It’s basically 2025. I feel bad for the people who have ancient hardware but it’s really time to go full avx2

Intel has been releasing CPUs that lack support for avx2 until at least 2021. Also you consider hardware from 2013 ancient !

This discussion happened already in the corresponding GitHub issue...how many of those CPUs post a benchmark score over the PCSX2 required minimum?

[TheLastRar]

Can any further discussion on requiring AVX2 be done in #11382