Allow ak.nan_to_num arguments to be arrays.

[jpivarski]

This will unblock scikit-hep/vector#172, as soon is it gets into a release.

Rather than change Vector to get non-release candidate versions, I should try to get a release candidate for Awkward out. It's overdue.

[codecov]

Codecov Report

Merging #1298 (1a064bb) into main (8e68200) will increase coverage by 1.68%.
The diff coverage is 77.62%.

Impacted Files	Coverage Δ
src/awkward/_v2/_connect/numba/arrayview.py	96.24% <ø> (ø)
src/awkward/_v2/_connect/numba/layout.py	87.01% <ø> (ø)
src/awkward/_v2/_prettyprint.py	63.79% <0.00%> (ø)
src/awkward/_v2/operations/convert/ak_from_cupy.py	25.00% <0.00%> (-50.00%)	⬇️
src/awkward/_v2/operations/convert/ak_to_arrow.py	60.00% <ø> (ø)
src/awkward/_v2/operations/describe/ak_type.py	44.11% <0.00%> (ø)
src/awkward/_v2/operations/structure/ak_isclose.py	100.00% <ø> (ø)
.../awkward/_v2/operations/structure/ak_nan_to_num.py	75.00% <ø> (ø)
src/awkward/_v2/operations/convert/ak_to_cupy.py	8.19% <3.44%> (-66.81%)	⬇️
src/awkward/_v2/operations/describe/ak_backend.py	9.52% <9.52%> (ø)
... and 86 more