Revisit BatchManager

[whyitfor]

The BatchManager seems to duplicate functionality provide by asyncio.Semaphore.

Goal of this issue is to investigate whether it can be replaced entirely by a Semaphore. The goal of this is to simplify ofrak_io and make the OFRAK code base incrementally more maintainable.

Which files would be affected?
The package ofrak_io, ofrak_ghidra`.

Does the proposed maintenance include non-doc string functional changes to the Python code?
Potentially -- it would remove the BatchManager interface and update the ofrak_ghidra implementation.

Are you interested in implementing it yourself?
No