refactor: add internal with_operation_context

[agoose77]

This PR refactors our operations to use a decorator for providing an error context. This makes it easier to add new functions, but also improves readability.

Closes #1839

[codecov]

Codecov Report

Merging #2525 (c5cd53e) into main (f928ba2) will increase coverage by 0.20%.
The diff coverage is 92.48%.

Additional details and impacted files

Impacted Files	Coverage Δ
src/awkward/operations/ak_mean.py	82.22% <57.14%> (+4.44%)	⬆️
src/awkward/operations/ak_std.py	85.36% <57.14%> (+4.87%)	⬆️
src/awkward/operations/ak_var.py	83.33% <57.14%> (+4.16%)	⬆️
src/awkward/highlevel.py	76.82% <60.00%> (+1.28%)	⬆️
src/awkward/operations/ak_from_avro_file.py	80.00% <63.63%> (ø)
src/awkward/operations/ak_from_arrow_schema.py	70.00% <66.66%> (+10.00%)	⬆️
src/awkward/operations/ak_from_cupy.py	83.33% <66.66%> (+16.66%)	⬆️
src/awkward/operations/ak_from_rdataframe.py	33.33% <66.66%> (+7.24%)	⬆️
src/awkward/operations/ak_nan_to_none.py	45.45% <66.66%> (+7.35%)	⬆️
src/awkward/operations/ak_to_cupy.py	58.33% <66.66%> (+12.87%)	⬆️
... and 94 more

[jpivarski]

This is definitely a maintenance win. I didn't check that the error messages still look okay. If you've checked that, then merge it!

[agoose77]

I've changed a couple of the error messages so that the keyword argument names match the signatures (in places where we invoke the context manager manually), and made some of these cases render the self argument by position (for readability).