Various VTK fixes

[philippjfr]

• Updates to latest vtk.js 30.1.0
• Uses binary serialization for VTKJS files
• Fixes vtkvolume minimal test multiple javascript errors in browser, no render #6244

[philippjfr]

pre-commit.ci autofix

[codecov]

Codecov Report

Attention: Patch coverage is 36.36364% with 14 lines in your changes are missing coverage. Please review.

Project coverage is 82.95%. Comparing base (f40ca93) to head (190dbe2).
Report is 3 commits behind head on main.

Files	Patch %	Lines
panel/pane/vtk/vtk.py	26.31%	14 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #6559      +/-   ##
==========================================
- Coverage   82.97%   82.95%   -0.02%     
==========================================
  Files         313      313              
  Lines       46001    46019      +18     
==========================================
+ Hits        38169    38177       +8     
- Misses       7832     7842      +10     

Flag	Coverage Δ
ui-tests	40.06% <18.18%> (-0.01%)	⬇️
unitexamples-tests	71.21% <36.36%> (-0.01%)	⬇️

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