[llvm] [OpenMP][NFC] Add min/max threads/teams count into the KernelEnvironment (PR #70257)

[Johannes Doerfert via llvm-commits]

jdoerfert wrote:

> Trivial change, lots of tests impacted per the norm

I take this as a good thing, honestly, even if I don't have tooling to do the update and it takes a little longer.

https://github.com/llvm/llvm-project/pull/70257