Add support for jupyter autocomplete back to the IW

[rchiodo]

For #7406

Jupyter autocomplete was not enabled for the interactive window after we switched its implementation. This reenables it.

[codecov-commenter]

Codecov Report

Merging #8035 (df89633) into main (9c830c5) will decrease coverage by 0%.
The diff coverage is 100%.

@@          Coverage Diff          @@
##            main   #8035   +/-   ##
=====================================
- Coverage     70%     70%   -1%     
=====================================
  Files        367     367           
  Lines      22606   22603    -3     
  Branches    3425    3427    +2     
=====================================
- Hits       16045   16020   -25     
- Misses      5181    5196   +15     
- Partials    1380    1387    +7     

Impacted Files	Coverage Δ
src/client/common/utils/misc.ts	62% <100%> (ø)
src/client/datascience/notebook/helpers/helpers.ts	56% <100%> (+<1%)	⬆️
src/client/datascience/notebook/integration.ts	100% <100%> (ø)
...ence/notebook/intellisense/intellisenseProvider.ts	86% <100%> (-2%)	⬇️
...notebook/intellisense/jupyterCompletionProvider.ts	64% <100%> (-1%)	⬇️
...ience/variablesView/variableViewMessageListener.ts	77% <0%> (-23%)	⬇️
...ent/common/application/webviewViews/webviewView.ts	67% <0%> (-11%)	⬇️
...ent/datascience/jupyter/pythonVariableRequester.ts	64% <0%> (-6%)	⬇️
...client/datascience/kernel-launcher/kernelDaemon.ts	56% <0%> (-2%)	⬇️
src/client/datascience/jupyter/kernels/kernel.ts	75% <0%> (-2%)	⬇️
... and 4 more