Flytekitplugin pandera update: use entrypoint and structured dataset

[cosmicBboy]

Tracking issue

flyteorg/flyte#5851

Why are the changes needed?

The pandera flytekit plugin is out-dated and needs to be maintained.

What changes were proposed in this pull request?

• Adds an entrypoint config in setup.py for auto-registration of the type transformer
• Rename schema.py -> pandas_transformer.py
• Create a basics deck renderer PandasReportRenderer
• Add configuration ValidationConfig with on_error option. This is so that on_error="warn" can create a Flyte deck that's actually rendered in the UI. Ideally on_error="raise" will also render a deck, but right now there's a limitation where decks aren't rendered with failed tasks.

How was this patch tested?

Update the unit tests, run with pytest test in the plugin directory.

Check all the applicable boxes

• I updated the documentation accordingly.
• All new and existing tests passed.
• All commits are signed-off.

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 77.22%. Comparing base (cd8216a) to head (5ae037a).
Report is 23 commits behind head on master.

Additional details and impacted files

@@            Coverage Diff             @@
##           master    #2821      +/-   ##
==========================================
+ Coverage   76.82%   77.22%   +0.40%     
==========================================
  Files         196      246      +50     
  Lines       20301    22269    +1968     
  Branches     2610     2609       -1     
==========================================
+ Hits        15596    17198    +1602     
- Misses       4004     4317     +313     
- Partials      701      754      +53     

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