[MLIR] Simplify Semi-affine expressions by rule based matching and replacing...

[MLIR] Simplify Semi-affine expressions by rule based matching and replacing "expr - q * (expr floordiv q)" with  "expr mod q" expression.

Add rule based matching for detecting and transforming "expr - q * (expr floordiv q)"
to "expr mod q", where q is a symbolic exxpression, in simplifyAdd function.

Reviewed By: bondhugula, dcaballe

Differential Revision: https://reviews.llvm.org/D112985