Needs of feature that disabling optimization pipeline in runtime

@iritkatriel
This feature is needed for debugging or experimentation when handling optimized bytecode.
When I want to take a look at the sequence of bytecodes that is optimized with the specific pipeline but not all pipelines, I need to disable several pipelines from https://github.com/python/cpython/blob/30b4e9f9c42493136c58c56fee5553128bb32428/Python/flowgraph.c#L1843-L1851 and rebuild the CPython it's pretty painful because when I want to change the combination of optimization than I should rebuild CPython every time.

It would be great if there is a way to disable specific optimization pipelines at runtime when I want.
Above example is just one specific case and sometime I want to disable all _PyCfg_OptimizeCodeUnit or part of _PyCfg_OptimizeCodeUnit.

This is what I wanted to ask about at the PyCon and will happy to see your opinion about this.

Start with Python/flowgraph.c at the _PyCfg_OptimizeCodeUnit pipeline referenced in the issue, and trace how its optimization stages are selected during runtime. Define how specific stages or the entire pipeline could be disabled without rebuilding CPython, then verify that different optimization combinations can be inspected as requested.