ci: only run php unit tests when php files changed

[max-nextcloud]

They take 10 minutes to setup nextcloud
and block available CI runners.

This is particularly wasteful with javascript dependency updates.
Dependabot will rebase the pending updates
upon every push to the underlying branch.

Signed-off-by: Max max@nextcloud.com

• Resolves: #
• Target version: master

Summary

[juliusknorr]

Good point 👍

[juliusknorr]

/backport to stable24

[juliusknorr]

/backport to stable23

[juliusknorr]

/backport to stable22

[backportbot-nextcloud]

The backport to stable24 failed. Please do this backport manually.

[backportbot-nextcloud]

The backport to stable23 failed. Please do this backport manually.

[backportbot-nextcloud]

The backport to stable22 failed. Please do this backport manually.

[max-nextcloud]

@juliushaertl frankly I think the backports do not matter so much. Most PR's run against master and master is getting updated frequently so that dependabot rebases also happen quite often. So having this in master will already reduce ci times significantly.
It might be good for consistency to apply it to older branches - but i don't think it's really needed. I'm thinking about doing the same for nextcloud/server - i think that would save more CI minutes with a comparable effort to backporting it in text.

[max-nextcloud]

Looks like i've been wrong about stable24. Tiptap has a lot of small packages in a monorepo that all get bumped at once. And stable24 is still up to date with them. So we get a lot of stable24 updates for tiptap. I'll start a backport of this to stable24.