improve code lens provider performance

[amunger]

for #11433

When looking at a large file with many code lenses, most of the code lens provider's is spent creating the code lens objects that are returned, and resulting gc calls. Even more is spent serializing those objects for the response, but that is outside the extension's scope.

This change focuses on speeding up the iteration through code lens range, reducing the getDocument and localize calls.

Parsing the file itself to divide it into cells isn't that large of an impact, so I didn't spend the time implementing a more complex incremental update.

[rebornix]

It was probably not introduced in this PR but the check for text document uris seem wrong.

[codecov-commenter]

Codecov Report

Merging #11696 (6ca094a) into main (903b39e) will increase coverage by 0%.
The diff coverage is 85%.

@@          Coverage Diff           @@
##            main   #11696   +/-   ##
======================================
  Coverage     59%      60%           
======================================
  Files        483      483           
  Lines      34447    34498   +51     
  Branches    5601     5609    +8     
======================================
+ Hits       20668    20703   +35     
- Misses     11827    11841   +14     
- Partials    1952     1954    +2     

Impacted Files	Coverage Δ
src/interactive-window/editor-integration/types.ts	100% <ø> (ø)
src/telemetry.ts	7% <0%> (-1%)	⬇️
...teractive-window/editor-integration/codewatcher.ts	70% <75%> (-1%)	⬇️
...tive-window/editor-integration/codelensprovider.ts	78% <83%> (+<1%)	⬆️
...ctive-window/editor-integration/codeLensFactory.ts	91% <87%> (+1%)	⬆️
...ow/editor-integration/pythonCellFoldingProvider.ts	81% <100%> (+1%)	⬆️
...ernels/jupyter/session/requestAgentCreator.node.ts	60% <0%> (-40%)	⬇️
...s/controllers/kernelRanking/kernelRankingHelper.ts	70% <0%> (-9%)	⬇️
.../notebooks/controllers/controllerDefaultService.ts	69% <0%> (-5%)	⬇️
...nels/jupyter/session/jupyterRequestCreator.node.ts	53% <0%> (-4%)	⬇️
... and 15 more