[mlir][func] Guard for unranked memref with the bare ptr memref call

Lowering the call op with use-bare-ptr-memref-call crashes due to the unsupported unranked memref type. We can prevent the crash by checking the type of operand in the pass instead of the assertion in the type converter.

Issue: https://github.com/llvm/llvm-project/issues/61872

Reviewed By: ftynse

Differential Revision: https://reviews.llvm.org/D148078