Fix required metadata not being required

[Arnei]

In the backend, metadata catalogs can be configured as needed. One thing that can be configured for each metadata field is if is considered required. A user should not be able to leave a required field empty (or set it to

empty). Our validation was ignoring said configuration, merely enforcing the title field.

This fixes the issue by dynamically creating a validation schema based on configuration for the existing metadata fields. Although it really feels like Yup does not want me to do this.

Fixes #317.
Includes #798.

[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-800

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-800

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/800/2024-09-16_07-34-33/ .
It might take a few minutes for it to become available.

[gregorydlogan]

Does what it says on the tin. Does not address the series side of things, which has the same options (at least in the config file). Is that something you want to address here since I'm assuming the logic would be more or less copy+paste?

[Arnei]

Series side addressed (I think. Have not looked at this code in a while.)