fix: Made some plugin types generic

[bmingles]

I missed making WidgetPanelProps generic in the last PR which is needed to version bump plotly express.
resolves #1759

[codecov]

Codecov Report

Attention: 6 lines in your changes are missing coverage. Please review.

Comparison is base (e6dd3e1) 46.06% compared to head (e0474e6) 46.06%.

Files	Patch %	Lines
...ges/dashboard-core-plugins/src/GridPanelPlugin.tsx	0.00%	2 Missing ⚠️
...s/dashboard-core-plugins/src/PandasPanelPlugin.tsx	0.00%	2 Missing ⚠️
...es/dashboard-core-plugins/src/ChartPanelPlugin.tsx	0.00%	1 Missing ⚠️
.../dashboard-core-plugins/src/PandasWidgetPlugin.tsx	0.00%	1 Missing ⚠️

Additional details and impacted files

@@           Coverage Diff           @@
##             main    #1769   +/-   ##
=======================================
  Coverage   46.06%   46.06%           
=======================================
  Files         626      626           
  Lines       37596    37596           
  Branches     9460     9460           
=======================================
  Hits        17319    17319           
  Misses      20222    20222           
  Partials       55       55           

Flag	Coverage Δ
unit	46.06% <25.00%> (ø)

Flags with carried forward coverage won't be shown. Click here to find out more.

☔ View full report in Codecov by Sentry.
📢 Have feedback on the report? Share it here.