Fix reopening a remote kernel

[rchiodo]

Fixes #7610

Made a new event on the controller indicating when remote kernels are refreshed. This allows me to listen for that and update a memento setting for the kernel id.

Initially I had attempted to just do that for all kernel starts, but the notebookcontrollermanager doesn't have the kernel at that point so there's no way to tell which notebook it's for. I needed an event that fired AFTER the controller has updated because of kernel start.

[rchiodo]

Oh and I also changed the UI a little bit.

Old UI shows this for remote kernels in the selector:

I changed it so that the notebook path was part of the real name:

The reason for this is because there's no way to tell you're connected to an already running kernel in the notebook without it.

All of the kernels look the same:

Whereas now the existing ones will look like this:

[codecov-commenter]

Codecov Report

Merging #8510 (636a7db) into main (a2579ab) will decrease coverage by 0%.
The diff coverage is 63%.

❗ Current head 636a7db differs from pull request most recent head b923a69. Consider uploading reports for the commit b923a69 to get more accurate results

@@          Coverage Diff          @@
##            main   #8510   +/-   ##
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- Coverage     71%     71%   -1%     
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  Files        377     378    +1     
  Lines      23920   23982   +62     
  Branches    3681    3691   +10     
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+ Hits       17204   17225   +21     
- Misses      5225    5270   +45     
+ Partials    1491    1487    -4     

Impacted Files	Coverage Δ
src/client/datascience/baseJupyterSession.ts	76% <ø> (-1%)	⬇️
src/client/datascience/jupyter/jupyterSession.ts	67% <0%> (-5%)	⬇️
src/client/datascience/notebook/types.ts	100% <ø> (ø)
...client/datascience/raw-kernel/rawJupyterSession.ts	77% <0%> (+5%)	⬆️
src/client/datascience/types.ts	100% <ø> (ø)
...t/datascience/notebook/vscodeNotebookController.ts	75% <20%> (-6%)	⬇️
...ient/datascience/jupyter/kernels/kernelSelector.ts	68% <53%> (-11%)	⬇️
src/client/datascience/jupyter/kernels/helpers.ts	71% <66%> (-2%)	⬇️
.../client/datascience/notebook/liveKernelSwitcher.ts	68% <68%> (ø)
.../datascience/notebook/notebookControllerManager.ts	71% <100%> (-4%)	⬇️
... and 36 more