fix: ape test -vvv was not using correct pytest verbosity

[antazoey]

What I did

-vvv was no longer failing as of recent changes but it also wasn't using the correct pytest verbosity.
The PR makes it actually work in pytest.

Actually really need this for the work I am doing with the snapshotting

How I did it

a few things had to be fixed, was more difficult than would have liked:

1. In the Pytest plugin itself, verbosity was always getting downgraded in certain conditions; had to make it not do that if the verbosity was already higher than what it would set if it was doing that shit.
2. Make a custom command for ape test to handle parsing args. It needed to parse the -v before click otherwise couldnt get it to work with -v without a value error, even with callback.
3. The validaion of pytest args was ignoing the case of -v by itself in the middle where the next arg isnt an ape verbosity lvl

How to verify it

Run:

ape test -vvv

Checklist

• All changes are completed
• New test cases have been added
• Documentation has been updated