Envs cache initialization

[kimadeline]

Follow-up to #14065, see #14065 (comment).

This (still) impacts #14020.

• 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 #14180 into main will decrease coverage by 0.00%.
The diff coverage is 33.33%.

@@            Coverage Diff             @@
##             main   #14180      +/-   ##
==========================================
- Coverage   59.95%   59.94%   -0.01%     
==========================================
  Files         706      706              
  Lines       39135    39138       +3     
  Branches     5674     5674              
==========================================
  Hits        23463    23463              
- Misses      14438    14440       +2     
- Partials     1234     1235       +1     

Impacted Files	Coverage Δ
src/client/pythonEnvironments/index.ts	17.07% <33.33%> (+1.28%)	⬆️
src/client/common/utils/platform.ts	68.00% <0.00%> (-4.00%)	⬇️
src/client/common/process/proc.ts	15.21% <0.00%> (ø)

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[ericsnowcurrently]

Aside from one small thing, LGTM.

[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