Use daemon for starting jupyter notebooks

[DonJayamanne]

For #7242

[codecov-io]

Codecov Report

Merging #8543 into master will increase coverage by 0.07%.
The diff coverage is 88.31%.

@@            Coverage Diff             @@
##           master    #8543      +/-   ##
==========================================
+ Coverage   58.71%   58.78%   +0.07%     
==========================================
  Files         511      512       +1     
  Lines       23306    23386      +80     
  Branches     3824     3837      +13     
==========================================
+ Hits        13684    13748      +64     
- Misses       8703     8716      +13     
- Partials      919      922       +3

Impacted Files	Coverage Δ
src/client/datascience/types.ts	100% <ø> (ø)	⬆️
...datascience/jupyter/liveshare/hostJupyterServer.ts	16.04% <0%> (ø)	⬆️
src/client/datascience/jupyter/jupyterCommand.ts	96.42% <100%> (+0.77%)	⬆️
...client/datascience/jupyter/jupyterCommandFinder.ts	73.43% <100%> (-0.17%)	⬇️
src/client/datascience/activation.ts	92% <100%> (ø)
src/client/datascience/jupyter/jupyterExecution.ts	50.69% <100%> (ø)	⬆️
...rc/client/common/process/pythonExecutionFactory.ts	93.44% <100%> (+0.46%)	⬆️
src/client/datascience/jupyter/notebookStarter.ts	63.88% <74.07%> (-0.4%)	⬇️
...ascience/interactive-ipynb/nativeEditorProvider.ts	53.96% <75%> (+0.3%)	⬆️
...ient/datascience/interactive-ipynb/nativeEditor.ts	57.64% <0%> (-1.13%)	⬇️
... and 10 more

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[rchiodo]

[IanMatthewHuff]