Add per execution process_func_args argument

[hagenw]

Closes #156

This adds a process_func_args argument to all the processing methods, e.g. audinterface.Process.process_index().
It can be used to overwrite the process_func_args argument used during instantiation of the interface.

Example:

import audinterface
import numpy as np

def addition(signal, sampling_rate, value=1):
    return signal + value * signal

interface = audinterface.Process(
    process_func=addition,
    process_func_args={"value": 2},
)
signal = np.ones((1, 3))
sampling_rate = 8000
interface.process_signal(signal, sampling_rate, process_func_args={"value": 3})

returns

start   end                   
0 days  0 days 00:00:00.000375    [[4.0, 4.0, 4.0]]
dtype: object

It will not overwrite the content of the class attribute interface.process_func_args, which will always only store the global setting.

Example docstring:

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 100.0%. Comparing base (31ad344) to head (7d0b16e).
Report is 2 commits behind head on main.

Additional details and impacted files

Files	Coverage Δ
audinterface/core/feature.py	100.0% <100.0%> (ø)
audinterface/core/process.py	100.0% <100.0%> (ø)
audinterface/core/process_with_context.py	100.0% <100.0%> (ø)
audinterface/core/segment.py	100.0% <100.0%> (ø)

[maxschmitt]

Thanks for this feature and the extensive new tests.
Looks good to me.

[hagenw]

@frankenjoe

If you are curious, I think this might be the only change in audinterface 1.2.0, that touches attributes of the objects.