[pe] Add gflags for num_profiled_runs and bailout_depth, laint (#49059)
Summary:
Pull Request resolved: https://github.com/pytorch/pytorch/pull/49059
We'd like to be able to change these defaults without rebuilding the library.
ghstack-source-id: 118140486
Test Plan: `buck build //caffe2/test:jit`
Reviewed By: eellison
Differential Revision: D25405568
fbshipit-source-id: 5d0561a64127adc44753e48d3b6c7f560c8b5820
