Upgrade to JupyterLab 4

[marjo-luc]

jupyterlab/jupyterlab#15921
https://jupyterlab.readthedocs.io/en/latest/getting_started/lifecycle.html

Jupyterlab 4 improvements:
https://blog.jupyter.org/jupyterlab-4-0-is-here-388d05e03442

Tagging everyone for visibility as this may affect most subsystems.

[grallewellyn]

Things to consider about Jupyterlab4 upgrade that we have talked about in meetings:

• miniconda has caused problems when @anilnatha tried to upgrade it before (and I also experienced some trouble changing the miniconda version for the base images). Sujen said that we don't need to stick with miniconda

[sujen1412]

Do we want to create a v4.0.0 milestone ? Maybe leave the end date open once we talk with the team about planning what to include in first v4 release.

[grallewellyn]

Sounds good to me!

[anilnatha]

Yup, I'm good with that.

[anilnatha]

@sujen1412 Just a thought, rather than a milestone, how about a JupyterLab 4 Upgrade Epic? We can then track subtasks related to that epic.

Reason being the milestone is tracking a versioned release with our next potentially being a major release due to breaking changes.

So our next milestone may be 4.X.Y, and in that release would be the jupyterlab epic and any other tickets we also address in that time.