Switch to react-tooltips

[Arnei]

Originally #1485

Fixes #1446.

Replaces our mui tooltip wrapper with react-tooltip. Also adds back tooltips that were commented out.

The reason for this change is that tooltips from react-tooltip are much more performant
when used in larger quantities. It will still add about ~100ms to the render time of events or series
tables with a 100 elements, which is not great but hardly noticable with our load times of over a second.

How to test this

Does not require any special set up for testing. Check that tooltips appear where you expect them and behave as you would expect them to.

[github-actions]

Use docker or podman to test this pull request locally.

Run test server using develop.opencast.org as backend:

podman run --rm -it -p 127.0.0.1:3000:3000 ghcr.io/opencast/admin-interface:pr-1569

Specify a different backend like stable.opencast.org:

podman run --rm -it -p 127.0.0.1:3000:3000 -e PROXY_TARGET=https://stable.opencast.org ghcr.io/opencast/admin-interface:pr-1569

It may take a few seconds for the interface to spin up.
It will then be available at http://127.0.0.1:3000.
For more options you can pass on to the proxy, take a look at the README.md.

[github-actions]

This pull request is deployed at test.admin-interface.opencast.org/1569/2026-04-07_09-15-24/ .
It might take a few minutes for it to become available.

[geichelberger]

I don't know what it is, but I find the tooltips annoying. Maybe it's because they appear too fast or because they don't disappear if you move to the next element?

[Arnei]

Given that 1 out of 2 reviewers is unhappy with these tooltips, maybe we want to revert this?

[geichelberger]

I wouldn't revert it; let's wait for user feedback.