Add option to disable operator profiling (#5720)

Summary:
X-link: https://github.com/pytorch/pytorch/pull/136838

Pull Request resolved: https://github.com/pytorch/executorch/pull/5720

For smaller models the overhead of profiling ops might be prohibitively large (distorting the inference execution time significantly) so we provide users an option to disable op profiling and essentially only profile the important events such as inference execution time.

To disable operator profiling users need to do:
```
etdump_gen.set_event_tracer_profiling_level(executorch::runtime::EventTracerProfilingLevel::kNoOperatorProfiling);
```

Reviewed By: dbort

Differential Revision: D61883224

fbshipit-source-id: f4fdcb67be00762152ca90b10239d10c2664a926