[mlir] Use bind_front in RemarkEngine. NFC. (#175818)
Switch from C++11 `std::bind` to C++26 `bind_front` backported in
https://github.com/llvm/llvm-project/pull/175056.
The former is an old design that predates lambdas and uses explicit
placeholders. `bind_front` should produce a much smaller object (we only
need one pointer).
