No good way to define pass manager for use in transpile

What is the expected enhancement?

Supposed I want to write a pass manager that can be used for any input circuit or backend, for example, and can be simply passed to transpile, e.g.

transpile(qc, backend, pass_manager=my_pass_manager)

I do not think that there is actually a way to do this without doing additional work in building TranpileConfig for initializing the PM, or just directly setting the properties upon construction. Instead, it would be nice if pass_manager could take a function, for example, that uses the internally computed TranspileConfig to initialize a PM (just like the preset ones do). Then a user defined pass_manager could be simply imported like any other function, and just passed to transpile with no additional work required.

[nonhermitian]

I do not care. I just want the functionality.

[1ucian0]

What if you want to do thousands of circuits in parallel like is possible in transpile?

I implemented the @ajavadia 's approach in https://github.com/Qiskit/qiskit-terra/pull/3290

That would close this issue?