Add tests for spikesorting

[CBroz1]

Description

This PR adds tests for spikesorting.v1 using existing notebooks

A notable absence is full testing of FigURL utilities pending discussion of how to best interface for CI/CD

Coverage report

---------- coverage: platform linux, python 3.9.19-final-0 -----------
Name                                                       Stmts   Miss  Cover   Missing
----------------------------------------------------------------------------------------
src/spyglass/spikesorting/analysis/v1/group.py                92     34    63%   76-78, 107-126, 176, 187-195, 199, 214, 232-247, 277, 292
src/spyglass/spikesorting/analysis/v1/unit_annotation.py      41      2    95%   75, 138
src/spyglass/spikesorting/imported.py                         64     35    45%   49-58, 64, 70, 92-111, 119-132, 137-148
src/spyglass/spikesorting/spikesorting_merge.py               91     19    79%   106, 134-142, 213-228, 259
src/spyglass/spikesorting/utils.py                            97     48    51%   76-78, 89, 102-103, 111-115, 120-124, 146-152, 161-204, 237, 243-248, 250-255, 260-278, 282
src/spyglass/spikesorting/v1/artifact.py                      86     25    71%   68, 98-99, 241, 282-316, 335-357
src/spyglass/spikesorting/v1/curation.py                     157     33    79%   92-93, 144-162, 241-266, 357-364, 388, 414, 440-443, 478-480
src/spyglass/spikesorting/v1/figurl_curation.py               85     55    35%   47-58, 69-103, 122-166, 170-171, 182, 200-267
src/spyglass/spikesorting/v1/metric_curation.py              189     29    85%   87, 132, 136-138, 158, 189-190, 236, 285, 375, 420, 429-430, 434, 479-498, 557
src/spyglass/spikesorting/v1/metric_utils.py                  19      5    74%   43-50, 58
src/spyglass/spikesorting/v1/recording.py                    202     30    85%   82, 85, 121, 156-157, 234, 373-384, 406-421, 442-449, 468, 470, 475, 498-499
src/spyglass/spikesorting/v1/sorting.py                      117     27    77%   99, 130-131, 202, 206, 231-241, 253, 269-275, 319-348, 384
src/spyglass/spikesorting/v1/utils.py                         27      2    93%   87, 97
----------------------------------------------------------------------------------------
TOTAL                                                       1267    344    73%

Checklist:

• No. This PR should be accompanied by a release: (yes/no/unsure)
• N/a. If release, I have updated the CITATION.cff
• No. This PR makes edits to table definitions: (yes/no)
• N/a. If table edits, I have included an alter snippet for release notes.
• N/a. If this PR makes changes to position, I ran the relevant tests locally.
• I have updated the CHANGELOG.md with PR number and description.
• N/a. I have added/edited docs/notebooks to reflect the changes