Add legend_labels option to allow overriding legend labels

[philippjfr]

Fixes #5322

[jbednar]

Looks great to me; not sure why 30 tests are failing!

[codecov-commenter]

Codecov Report

Merging #5342 (c230494) into master (3d3154a) will increase coverage by 0.04%.
The diff coverage is 98.78%.

@@            Coverage Diff             @@
##           master    #5342      +/-   ##
==========================================
+ Coverage   88.11%   88.16%   +0.04%     
==========================================
  Files         300      300              
  Lines       61874    61912      +38     
==========================================
+ Hits        54522    54585      +63     
+ Misses       7352     7327      -25     

Impacted Files	Coverage Δ
holoviews/operation/datashader.py	83.98% <ø> (+1.78%)	⬆️
holoviews/plotting/util.py	69.49% <ø> (ø)
holoviews/plotting/bokeh/element.py	88.86% <95.65%> (+0.06%)	⬆️
holoviews/plotting/bokeh/raster.py	71.30% <100.00%> (ø)
holoviews/plotting/mpl/element.py	90.02% <100.00%> (+0.06%)	⬆️
holoviews/plotting/mpl/raster.py	77.77% <100.00%> (+0.07%)	⬆️
holoviews/tests/plotting/bokeh/test_overlayplot.py	100.00% <100.00%> (ø)
holoviews/tests/plotting/bokeh/test_pathplot.py	100.00% <100.00%> (ø)
holoviews/tests/plotting/bokeh/test_pointplot.py	100.00% <100.00%> (ø)
...iews/tests/plotting/matplotlib/test_overlayplot.py	97.70% <100.00%> (+0.40%)	⬆️
... and 1 more

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[github-actions]

This pull request has been automatically locked since there has not been any recent activity after it was closed. Please open a new issue for related bugs.