Move notebook debugger into notebook folder

[DonJayamanne]

Part of #10037

The plan is to have the following folder structure:
src->platform->debugger->jupyter->notebook (specific to notebook debugging)
src->platform->debugger->jupyter->interactiveWindow (specific to IW debugging)
src->platform->debugger->jupyter->common (Stuff thats common to both will eventually move into this folder)

[codecov-commenter]

Codecov Report

Merging #10038 (91c5acf) into main (1a06230) will increase coverage by 0%.
The diff coverage is 76%.

@@          Coverage Diff           @@
##            main   #10038   +/-   ##
======================================
  Coverage     63%      63%           
======================================
  Files        215      216    +1     
  Lines      10122    10127    +5     
  Branches    1612     1612           
======================================
+ Hits        6473     6480    +7     
+ Misses      3131     3125    -6     
- Partials     518      522    +4     

Impacted Files	Coverage Δ
...gger/jupyter/notebook/debugCellControllers.node.ts	25% <25%> (ø)
src/platform/debugger/jupyter/helper.node.ts	54% <100%> (+2%)	⬆️
...atform/debugger/jupyter/kernelDebugAdapter.node.ts	69% <100%> (ø)
...debugger/jupyter/notebook/debuggingManager.node.ts	53% <100%> (ø)
...ugger/jupyter/notebook/runByLineController.node.ts	66% <100%> (ø)
src/platform/serviceRegistry.node.ts	97% <100%> (ø)
src/platform/errors/errorHandler.ts	62% <0%> (-1%)	⬇️
...rc/platform/common/dataScienceSurveyBanner.node.ts	69% <0%> (+3%)	⬆️

[sadasant]

I love it! Short & well scoped ✅