Add an extension-specific locator that will wrap the low-level locators.

[ericsnowcurrently]

(Note that most of this PR is new tests.)

• 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.

[codecov-commenter]

Codecov Report

Merging #13780 into main will increase coverage by 0.09%.
The diff coverage is 86.58%.

@@            Coverage Diff             @@
##             main   #13780      +/-   ##
==========================================
+ Coverage   59.91%   60.01%   +0.09%     
==========================================
  Files         682      685       +3     
  Lines       37935    38086     +151     
  Branches     5462     5487      +25     
==========================================
+ Hits        22730    22857     +127     
+ Misses      14046    14045       -1     
- Partials     1159     1184      +25     

Impacted Files	Coverage Δ
src/client/common/utils/async.ts	84.94% <71.42%> (-2.56%)	⬇️
...ent/pythonEnvironments/discovery/locators/index.ts	87.93% <89.70%> (+2.21%)	⬆️
src/client/datascience/crossProcessLock.ts	79.41% <0.00%> (-11.77%)	⬇️
src/client/common/utils/platform.ts	56.00% <0.00%> (-8.00%)	⬇️
...rc/client/datascience/notebookStorage/baseModel.ts	64.28% <0.00%> (-3.14%)	⬇️
src/client/linters/pydocstyle.ts	86.66% <0.00%> (-2.23%)	⬇️
src/client/datascience/debugLocationTracker.ts	76.56% <0.00%> (-1.57%)	⬇️
src/client/common/process/proc.ts	14.49% <0.00%> (-0.73%)	⬇️
src/client/logging/levels.ts	61.11% <0.00%> (ø)
src/client/logging/logger.ts	62.74% <0.00%> (ø)
... and 14 more

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[kimadeline]

Some linting issues (pipeline):

[kimadeline]

Would prefer if my comment was addressed, but not blocking.

Note that the uses for ... of are going to generate ESLint warnings, and array iterations should be preferred whenever possible.

[sonarqubecloud]

Kudos, SonarCloud Quality Gate passed!

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

No Coverage information
No Duplication information