Add an op_lowering_disallow_list in fx splitter base class. (#82288)
Summary: ATT, so that we can control not to lower some specific ops.
Test Plan: Tested together with the next diff in stack.
Differential Revision: D38188836
Pull Request resolved: https://github.com/pytorch/pytorch/pull/82288
Approved by: https://github.com/mikeiovine, https://github.com/khabinov
