fix tree api being called twice on initial load due to uninitialized context being used

[imatiach-msft]

Description

During profiling, I found that /tree was still being called twice on initial load of error analysis component, hurting performance - specifically for large data. This was due to context being used incorrectly in the constructor. For more information, please see:
facebook/react#6598
This is the correct way to use context in constructor. Due to uninitialized context being used in constructor, we were calling the tree API again in componentDidUpdate because the code thought there was a state change.

Areas changed

npm packages changed:

• responsibleai/causality
• responsibleai/core-ui
• responsibleai/counterfactuals
• responsibleai/dataset-explorer
• responsibleai/fairness
• responsibleai/interpret
• responsibleai/localization
• responsibleai/mlchartlib
• responsibleai/model-assessment

Python packages changed:

• raiwidgets
• responsibleai
• erroranalysis
• rai_core_flask

Tests

• No new tests required.
• New tests for the added feature are part of this PR.
• I validated the changes manually.

Screenshots (if appropriate):

Documentation:

• My change requires a change to the documentation.
• I have updated the documentation accordingly.

[codecov-commenter]

Codecov Report

Merging #1229 (7976ea1) into main (810b861) will not change coverage.
The diff coverage is n/a.

@@           Coverage Diff           @@
##             main    #1229   +/-   ##
=======================================
  Coverage   67.19%   67.19%           
=======================================
  Files          91       91           
  Lines        4393     4393           
=======================================
  Hits         2952     2952           
  Misses       1441     1441           

Flag	Coverage Δ
unittests	67.19% <ø> (ø)

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[github-actions]

https://responsibleai.blob.core.windows.net/pullrequest/microsoft/responsible-ai-toolbox/ilmat/fix-context/dashboard/index.html

[github-actions]

https://responsibleai.blob.core.windows.net/pullrequest/microsoft/responsible-ai-toolbox/ilmat/fix-context/dashboard/index.html