Fix and improve Plotly event handling

[philippjfr]

After a ton of investigation I found that click event handling depends on the following sequence of events, which for some reason does not occur in the right sequence in our case (likely due to the shadow DOM):

1. Hover event data is captured and set on the Plotly container element
2. The click event handler checks if the hoverdata is present and only dispatches a click event if that's the case
3. On unhover the hoverdata is reset.

In our case steps 2 and 3 were switched causing click events not to be dispatched. In this PR we do a few things:

1. Temporarily patch the hoverdata to ensure it is present when the click handler expects it
2. Convert the various <event_data> bokeh properties into bokeh events, ensuring that the same event can be sent multiple times.

Fixes #5096

[codecov]

Codecov Report

Attention: Patch coverage is 56.52174% with 10 lines in your changes are missing coverage. Please review.

Project coverage is 37.24%. Comparing base (76c911a) to head (4c8ea0a).
Report is 16 commits behind head on main.

Files	Patch %	Lines
panel/pane/plotly.py	11.11%	8 Missing ⚠️
panel/models/plotly.py	66.66%	2 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #6753      +/-   ##
==========================================
- Coverage   40.01%   37.24%   -2.78%     
==========================================
  Files         313      314       +1     
  Lines       46194    46310     +116     
==========================================
- Hits        18486    17246    -1240     
- Misses      27708    29064    +1356     

Flag	Coverage Δ
ui-tests	37.24% <56.52%> (-2.78%)	⬇️

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