[llvm] [MCA] Parameterize variant scheduling classes by explicit variable (PR #92849)

[Aiden Grossman via llvm-commits]

boomanaiden154 wrote:

I'm not sure if this is the best way to handle this, but it seems like an easy way to fix an easy to trigger footgun, and at the very least adds documentation on the assumptions being made. Happy to hear alternative suggestions though!

https://github.com/llvm/llvm-project/pull/92849