Move connection out of execution

[DonJayamanne]

Fixes #8933

Basically the long term plan is to remove the JupyterExecution.
Creating connection information and validating connections to remote jupyter servers isn't a responsibility of the JupyterExecution. the class is kinda overloaded.

Moved connection related stuff into JupyterConnection class.

[codecov-commenter]

Codecov Report

Merging #9918 (02ab9ba) into main (3ba1e47) will decrease coverage by 31%.
The diff coverage is n/a.

❗ Current head 02ab9ba differs from pull request most recent head 662eae7. Consider uploading reports for the commit 662eae7 to get more accurate results

@@          Coverage Diff           @@
##           main   #9918     +/-   ##
======================================
- Coverage    63%     32%    -32%     
======================================
  Files       203     203             
  Lines      9834    9834             
  Branches   1566    1566             
======================================
- Hits       6249    3172   -3077     
- Misses     3083    6503   +3420     
+ Partials    502     159    -343     

Impacted Files	Coverage Δ
src/platform/debugger/debugLocationTracker.node.ts	3% <0%> (-91%)	⬇️
src/platform/common/contextKey.ts	11% <0%> (-89%)	⬇️
src/platform/common/process/pythonProcess.node.ts	10% <0%> (-87%)	⬇️
src/platform/common/utils/text.node.ts	11% <0%> (-86%)	⬇️
src/platform/common/refBool.node.ts	16% <0%> (-84%)	⬇️
src/platform/common/net/fileDownloader.node.ts	21% <0%> (-79%)	⬇️
src/platform/common/experiments/telemetry.node.ts	22% <0%> (-78%)	⬇️
src/platform/progress/progressReporter.node.ts	16% <0%> (-76%)	⬇️
src/platform/common/application/documentManager.ts	8% <0%> (-75%)	⬇️
src/platform/export/exportFileOpener.node.ts	26% <0%> (-74%)	⬇️
... and 132 more