Add helpers for identifying "system" errors.

[ericsnowcurrently]

(for #8995)

• Pull request represents a single change (i.e. not fixing disparate/unrelated things in a single PR)
• Title summarizes what is changing
• [ ] Has a news entry file (remember to thank yourself!)
• Appropriate comments and documentation strings in the code
• Has sufficient logging.
• [ ] Has telemetry for enhancements.
• Unit tests & system/integration tests are added/updated
• [ ] Test plan is updated as appropriate
• [ ] package-lock.json has been regenerated by running npm install (if dependencies have changed)
• [ ] The wiki is updated with any design decisions/details.

[sonarqubecloud]

Kudos, SonarCloud Quality Gate passed!

0 Bugs
0 Vulnerabilities (and 0 Security Hotspots to review)
0 Code Smells

No Coverage information
0.0% Duplication

[codecov-io]

Codecov Report

Merging #9615 into master will decrease coverage by 0.45%.
The diff coverage is 100%.

@@            Coverage Diff             @@
##           master    #9615      +/-   ##
==========================================
- Coverage   60.94%   60.49%   -0.46%     
==========================================
  Files         530      545      +15     
  Lines       28628    29377     +749     
  Branches     4338     4446     +108     
==========================================
+ Hits        17448    17771     +323     
- Misses      10229    10621     +392     
- Partials      951      985      +34

Impacted Files	Coverage Δ
src/client/common/platform/errors.ts	100% <100%> (ø)
src/client/linters/mypy.ts	38.46% <0%> (-49.04%)	⬇️
src/client/common/process/condaExecutionService.ts	70% <0%> (-30%)	⬇️
src/client/datascience/jupyter/jupyterVariables.ts	48.64% <0%> (-13.33%)	⬇️
...lient/datascience/jupyter/kernels/kernelService.ts	50.58% <0%> (-10.14%)	⬇️
src/client/common/process/pythonProcess.ts	92.3% <0%> (-4.19%)	⬇️
src/client/interpreter/activation/service.ts	84.93% <0%> (-2.77%)	⬇️
src/client/datascience/jupyter/notebookStarter.ts	69% <0%> (-2.55%)	⬇️
src/client/activation/activationService.ts	88.16% <0%> (-1.6%)	⬇️
...ce/interactive-window/interactiveWindowProvider.ts	13.68% <0%> (-1.44%)	⬇️
... and 64 more

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[karrtikr]

LGTM