[mlir] [llvm] [CI] Add check-mlir-python to MLIR pre-merge checks (PR #72847)

[Oleksandr Alex Zinenko via llvm-commits]

https://github.com/ftynse commented:

How/where do we specify the required version of Python and pybind? MLIR tends to be  eager in version bumps, so we may not have the correct version installed by default on "stable" distros.

https://github.com/llvm/llvm-project/pull/72847