[Docs] Context versus state

[peter-csala]

Pull Request

The issue or feature being addressed

• [Docs] Revise migration guide 3/3 #1775 (comment)
• Several documentation pages use a dummy state object without explaining the difference between that and the context

Details on the issue fix or feature implementation

• Added a subsection to the pipeline doc to clarify the difference between state and context objects
  • Preview
• Refactored the ExecuteCoreSync for better legibility
  • I had to read this line many times to understand what's happening here:
  • var result = state.callback(context, state.state);

Confirm the following

• I started this PR by branching from the head of the default branch
• I have targeted the PR to merge into the default branch
• I have included unit tests for the issue/feature
• I have successfully run a local build

[peter-csala]

cc: @martintmk

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Comparison is base (5bb4764) 84.59% compared to head (1d37cb1) 84.58%.

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #1847      +/-   ##
==========================================
- Coverage   84.59%   84.58%   -0.01%     
==========================================
  Files         308      308              
  Lines        6802     6798       -4     
  Branches     1049     1049              
==========================================
- Hits         5754     5750       -4     
  Misses        839      839              
  Partials      209      209              

Flag	Coverage Δ
linux	84.58% <100.00%> (-0.01%)	⬇️
macos	84.58% <100.00%> (-0.01%)	⬇️
windows	84.58% <100.00%> (-0.01%)	⬇️

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