No active PythonEnv controller for new kernel pick

[DonJayamanne]

Partially addresses #11932
Requires more work in subsequent PRs

[codecov-commenter]

Codecov Report

Merging #11933 (2bd8207) into main (3c58033) will increase coverage by 0%.
The diff coverage is 83%.

@@          Coverage Diff           @@
##            main   #11933   +/-   ##
======================================
  Coverage     62%      62%           
======================================
  Files        490      490           
  Lines      34602    34605    +3     
  Branches    5616     5617    +1     
======================================
+ Hits       21691    21709   +18     
+ Misses     10831    10808   -23     
- Partials    2080     2088    +8     

Impacted Files	Coverage Δ
src/notebooks/controllers/controllerLoader.ts	90% <83%> (-2%)	⬇️
src/platform/common/configuration/service.base.ts	76% <0%> (-3%)	⬇️
...c/platform/common/process/pythonDaemonPool.node.ts	77% <0%> (-2%)	⬇️
src/platform/common/process/condaService.node.ts	67% <0%> (-2%)	⬇️
src/notebooks/controllers/kernelRanking/helpers.ts	55% <0%> (-2%)	⬇️
...els/jupyter/finder/remoteKernelFinderController.ts	61% <0%> (-1%)	⬇️
src/kernels/kernelDependencyService.node.ts	83% <0%> (-1%)	⬇️
src/kernels/jupyter/launcher/serverUriStorage.ts	61% <0%> (-1%)	⬇️
...c/kernels/execution/cellExecutionMessageHandler.ts	77% <0%> (-1%)	⬇️
src/notebooks/debugger/debuggerVariables.ts	67% <0%> (-1%)	⬇️
... and 8 more

[rebornix]

👍