[mlir-tblgen] Fix failed matching when binds same operand of an op in different depth

For example, we will generate incorrect code for the pattern,

def : Pat<((FooOp (FooOp, $a, $b), $b)), (...)>;

We didn't allow $b to be bond twice with same operand of same op.

Reviewed By: jpienaar

Differential Revision: https://reviews.llvm.org/D105677