feat: Expose containerRef from ChartPanel

[mattrunyon]

This is needed so the plotly-express plugin can attach event handlers to the chart container to pause re-renders when the user is manipulating the view on a 3d plot

[codecov]

Codecov Report

Patch coverage: 100.00% and no project coverage change.

Comparison is base (8d890b7) 45.77% compared to head (ec7145a) 45.77%.

Additional details and impacted files

@@           Coverage Diff           @@
##             main    #1500   +/-   ##
=======================================
  Coverage   45.77%   45.77%           
=======================================
  Files         518      518           
  Lines       35177    35177           
  Branches     8812     8813    +1     
=======================================
  Hits        16103    16103           
  Misses      19023    19023           
  Partials       51       51           

Flag	Coverage Δ
unit	45.77% <100.00%> (ø)

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Files Changed	Coverage Δ
...s/dashboard-core-plugins/src/panels/ChartPanel.tsx	60.97% <100.00%> (ø)

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