Simplifies LS startup and update test baselines

[MikhailArkhipov]

Reflects changes to the analysis engine

This pull request:

• Has a title summarizes what is changing
• Has unit tests & code coverage is not adversely affected (within reason)
• Works on all actively maintained versions of Python (e.g. Python 2.7 & the latest Python 3 release)
• Works on Windows 10, macOS, and Linux (e.g. considered file system case-sensitivity)

[codecov]

Codecov Report

Merging #1762 into master will increase coverage by 0.15%.
The diff coverage is 11.11%.

@@            Coverage Diff             @@
##           master    #1762      +/-   ##
==========================================
+ Coverage   73.94%   74.09%   +0.15%     
==========================================
  Files         282      282              
  Lines       13117    13095      -22     
  Branches     2338     2338              
==========================================
+ Hits         9699     9703       +4     
+ Misses       3287     3260      -27     
- Partials      131      132       +1

Impacted Files	Coverage Δ
src/client/activation/analysis.ts	18.91% <11.11%> (+2.37%)	⬆️
...rc/client/debugger/PythonProcessCallbackHandler.ts	53.61% <0%> (-0.66%)	⬇️
src/client/debugger/mainV2.ts	80.72% <0%> (+2.81%)	⬆️

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