Re-Enable ability to use built in debugger for DS

[DonJayamanne]

For #6907

[rchiodo]

I think you can remove this comment here.

[codecov-io]

Codecov Report

Merging #8258 into master will increase coverage by 0.3%.
The diff coverage is 25%.

@@            Coverage Diff            @@
##           master    #8258     +/-   ##
=========================================
+ Coverage    58.7%   59.01%   +0.3%     
=========================================
  Files         504      504             
  Lines       23093    23101      +8     
  Branches     3728     3735      +7     
=========================================
+ Hits        13557    13632     +75     
+ Misses       8656     8589     -67     
  Partials      880      880

Impacted Files	Coverage Δ
src/client/datascience/jupyter/jupyterDebugger.ts	10.73% <25%> (+0.67%)	⬆️
src/client/language/characters.ts	33.33% <0%> (+2.56%)	⬆️
src/client/common/utils/version.ts	81.48% <0%> (+3.7%)	⬆️
src/client/providers/providerUtilities.ts	88.88% <0%> (+5.55%)	⬆️
src/client/datascience/cellFactory.ts	89.65% <0%> (+13.79%)	⬆️
src/client/api.ts	92.85% <0%> (+14.28%)	⬆️
src/client/common/utils/icons.ts	100% <0%> (+16.66%)	⬆️
...cience/jupyter/jupyterDebuggerNotInstalledError.ts	80% <0%> (+20%)	⬆️
src/client/formatters/serviceRegistry.ts	100% <0%> (+25%)	⬆️
...ience/jupyter/jupyterDebuggerRemoteNotSupported.ts	100% <0%> (+25%)	⬆️
... and 3 more

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