Remove bundled pvextractor and updated extraction tool to work properly with changes to .coords

[astrofrog]

This is the start of trying to address issues seen by @keflavich with CASA spectral cubes. Still need to figure out how to properly fix pvextractor though.

[codecov]

Codecov Report

Merging #2252 (af93cca) into main (15c720e) will decrease coverage by 0.03%.
The diff coverage is 90.90%.

@@            Coverage Diff             @@
##             main    #2252      +/-   ##
==========================================
- Coverage   88.04%   88.00%   -0.04%     
==========================================
  Files         247      247              
  Lines       23175    23176       +1     
==========================================
- Hits        20405    20397       -8     
- Misses       2770     2779       +9     

Impacted Files	Coverage Δ
glue/core/util.py	73.55% <66.66%> (-0.13%)	⬇️
glue/plugins/tools/pv_slicer/qt/pv_slicer.py	73.33% <80.00%> (-0.32%)	⬇️
glue/utils/array.py	88.06% <100.00%> (ø)
glue/viewers/histogram/python_export.py	91.11% <100.00%> (ø)
glue/viewers/profile/qt/profile_tools.py	90.12% <100.00%> (ø)
glue/viewers/profile/state.py	98.95% <100.00%> (ø)
glue/viewers/scatter/layer_artist.py	97.21% <100.00%> (ø)
glue/utils/qt/app.py	90.00% <0.00%> (-6.00%)	⬇️
glue/app/qt/preferences.py	88.61% <0.00%> (-2.44%)	⬇️
glue/plugins/dendro_viewer/data_factory.py	97.72% <0.00%> (-2.28%)	⬇️
... and 1 more

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