feat: add variable length loop kernels

[ManasviGoyal]

Added the following kernels:

1. awkward_IndexedArray_ranges_next_64*
2. awkward_IndexedArray_ranges_carry_next_64*
3. awkward_ListArray_getitem_jagged_descend
4. awkward_ListArray_getitem_jagged_numvalid*
5. awkward_ListArray_getitem_next_range_spreadadvanced*
6. awkward_ListOffsetArray_toRegularArray
7. awkward_ListOffsetArray_rpad_length_axis1
8. awkward_ListArray_broadcast_tooffsets*
9. awkward_ListArray_localindex*
10. awkward_ListOffsetArray_drop_none_indexes*
11. awkward_ListOffsetArray_reduce_local_nextparents_64*
12. awkward_ListOffsetArray_reduce_nonlocal_maxcount_offsetscopy_64
13. awkward_UnionArray_regular_index_getsize

*variable-length inner loop (need to look for a way to optimize, added them to #2987)

Also, fixed awkward_ListArray_compact_offsets. Now we can generate tests for kernels where out arguments are also in arguments.

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Comparison is base (b749e49) 81.90% compared to head (416f6f7) 81.90%.
Report is 3 commits behind head on main.

Additional details and impacted files

Files	Coverage Δ
src/awkward/_connect/cuda/__init__.py	0.00% <ø> (ø)

[codecov-commenter]

Codecov Report

All modified and coverable lines are covered by tests ✅

Comparison is base (b749e49) 81.90% compared to head (416f6f7) 81.90%.
Report is 13 commits behind head on main.

❗ Current head 416f6f7 differs from pull request most recent head 28bd029. Consider uploading reports for the commit 28bd029 to get more accurate results

Additional details and impacted files

Files	Coverage Δ
src/awkward/_connect/cuda/__init__.py	0.00% <ø> (ø)

[ManasviGoyal]

@jpivarski there are a few more kernels that would fall in the same category but I think it would be better to do that in a new PR.

[jpivarski]

Looks great! I also checked it out and tested it on my GPU. It's nice to see only 2 xfails left in tests-cuda.

Feel free to merge at any time.

Also, you're right to break them up in separate PRs like this.