Pass Parameter arguments by keyword only

[maximlt]

As per the title, to make things consistent and in preparation of an eventual change (later!) in Param.

[codecov-commenter]

Codecov Report

Merging #5680 (c3b24fe) into main (4d0f80b) will not change coverage.
The diff coverage is 100.00%.

@@           Coverage Diff           @@
##             main    #5680   +/-   ##
=======================================
  Coverage   88.30%   88.30%           
=======================================
  Files         302      302           
  Lines       62571    62571           
=======================================
  Hits        55251    55251           
  Misses       7320     7320           

Impacted Files	Coverage Δ
holoviews/selection.py	72.50% <ø> (ø)
holoviews/core/data/__init__.py	86.53% <100.00%> (ø)
holoviews/core/io.py	80.34% <100.00%> (ø)
holoviews/core/util.py	86.60% <100.00%> (ø)
holoviews/element/annotation.py	87.28% <100.00%> (ø)
holoviews/element/util.py	82.21% <100.00%> (ø)
holoviews/operation/element.py	71.79% <100.00%> (ø)
holoviews/plotting/mpl/renderer.py	79.83% <100.00%> (ø)
holoviews/plotting/renderer.py	71.86% <100.00%> (ø)
holoviews/streams.py	87.26% <100.00%> (ø)
... and 1 more

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