Allow to register formatter by types with lower precedence.

See #10650 as well, for bugs in the precedence of formatters. With `ipython/disp` we want to register formatters for older version of pyspark where objects do _not_ define `_repr_*_`, but so far the formatters are understood as "user defined", meaning that they take precedence over the `_repr_*_` methods. It would be nice to have an extra way of registering formatter with lower precedence.

cc @rgbkrk