Separate Kernel Specs & Python envs in kernel pick

[DonJayamanne]

Fixes #11927
Part of #11904

[codecov-commenter]

Codecov Report

Merging #11926 (aa4844d) into main (3c58033) will increase coverage by 0%.
The diff coverage is 77%.

❗ Current head aa4844d differs from pull request most recent head 498cd63. Consider uploading reports for the commit 498cd63 to get more accurate results

@@           Coverage Diff           @@
##            main   #11926    +/-   ##
=======================================
  Coverage     62%      62%            
=======================================
  Files        490      491     +1     
  Lines      34602    34702   +100     
  Branches    5616     5624     +8     
=======================================
+ Hits       21691    21781    +90     
- Misses     10831    10837     +6     
- Partials    2080     2084     +4     

Impacted Files	Coverage Δ
src/kernels/raw/types.ts	100% <ø> (ø)
...llers/kernelSource/notebookKernelSourceSelector.ts	10% <40%> (+<1%)	⬆️
src/platform/common/utils/localize.ts	75% <71%> (-1%)	⬇️
...raw/finder/contributedLocalPythonEnvFinder.node.ts	76% <76%> (ø)
src/kernels/internalTypes.ts	100% <100%> (ø)
...aw/finder/contributedLocalKernelSpecFinder.node.ts	75% <100%> (ø)
src/kernels/serviceRegistry.node.ts	100% <100%> (ø)
src/platform/common/process/condaService.node.ts	67% <0%> (-2%)	⬇️
...c/platform/common/process/pythonDaemonPool.node.ts	78% <0%> (-1%)	⬇️
...c/kernels/execution/cellExecutionMessageHandler.ts	77% <0%> (-1%)	⬇️
... and 11 more