Add native variable view doc switch tests

[IanMatthewHuff]

For #4355

• Pull request represents a single change (i.e. not fixing disparate/unrelated things in a single PR).
• Title summarizes what is changing.
• Has a news entry file (remember to thank yourself!).
• Appropriate comments and documentation strings in the code.
• Has sufficient logging.
• Has telemetry for enhancements.
• Unit tests & system/integration tests are added/updated.
• Test plan is updated as appropriate.
• package-lock.json has been regenerated by running npm install (if dependencies have changed).

[codecov-commenter]

Codecov Report

Merging #6303 (4593f03) into main (d8a42ac) will not change coverage.
The diff coverage is n/a.

@@          Coverage Diff          @@
##            main   #6303   +/-   ##
=====================================
  Coverage     72%     72%           
=====================================
  Files        401     401           
  Lines      27052   27052           
  Branches    3987    3987           
=====================================
  Hits       19538   19538           
- Misses      5866    5873    +7     
+ Partials    1648    1641    -7     

Impacted Files	Coverage Δ
src/client/datascience/kernel-launcher/types.ts	48% <0%> (-8%)	⬇️
src/client/common/errors/index.ts	69% <0%> (-4%)	⬇️
...lient/datascience/kernel-launcher/kernelProcess.ts	72% <0%> (-3%)	⬇️
...ent/datascience/jupyter/kernels/kernelExecution.ts	67% <0%> (-2%)	⬇️
...tascience/jupyter/liveshare/hostJupyterNotebook.ts	44% <0%> (-2%)	⬇️
src/client/datascience/jupyter/kernels/kernel.ts	75% <0%> (-1%)	⬇️
src/client/datascience/jupyter/jupyterNotebook.ts	75% <0%> (-1%)	⬇️
...active-common/intellisense/intellisenseProvider.ts	74% <0%> (-1%)	⬇️
src/client/datascience/baseJupyterSession.ts	71% <0%> (ø)
...t/datascience/kernel-launcher/localKernelFinder.ts	82% <0%> (+1%)	⬆️
... and 5 more

[IanMatthewHuff]

I've had part of this sitting around for like months. I think I was considering adding a few more tests so I didn't submit it. Just slipped off the radar, so merged main quick and submitted. Tested it a few times locally and on CI so looks stable.