[mlir][python] python binding for the affine.store op (#68816)

This PR creates the necessary files to support bindings for operations
in the affine dialect.

This is the first of many PRs which will progressively introduce
affine.load, affine.for, etc operations. I would like to
acknowledge the work by Nelli's author @makslevental :
https://github.com/makslevental/nelli/blob/main/nelli/mlir/affine/affine.py
which jump-starts the work.