Reduce duplicate code for table action dropdown

[Arnei]

Creates a new component for table action dropdowns. This should result in more readable code and make it easier to
introduce the component into other tables, should we ever need to.

How to test this

Can be tested as usual. The delete modal not opening is fixed by #1115.

[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/opencast-admin-interface:pr-1114

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/opencast-admin-interface:pr-1114

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/1114/2025-03-20_12-06-09/ .
It might take a few minutes for it to become available.

[github-actions]

This pull request has conflicts ☹
Please resolve those so we can review the pull request.
Thanks.

[ferishili]

Thanks @Arnei,
Unfortunately, the delete action from the dropdown does not work properly.
However codewise looks good!

[Arnei]

As mentioned in the initial post, the delete action not opening is fixed by PR #1115. I'll merge that into this branch once main is not broken anymore.

[github-actions]

This pull request has conflicts ☹
Please resolve those so we can review the pull request.
Thanks.

[github-actions]

This pull request has conflicts ☹
Please resolve those so we can review the pull request.
Thanks.

[ferishili]

Thanks @Arnei, LGTM

[geichelberger]

LGTM