[stable22] Ignore vendor-bin

[kesselb]

#30826 is partly a backport of #28507 but did not add the vendor-bin directory to .gitignore.

[szaimen]

@kesselb are the three failing tests unrelated?

[kesselb]

@kesselb are the three failing tests unrelated?

Good question 🤔

The purpose of this pull request is to make the psalm baseline update work for stable22. When you run composer install it will install some dependencies to vendor-bin. Those are usually for development (e.g. phpunit or psalm) and scoped (via vendor-bin plugin) to not interfere with the application dependencies. Right now those scoped tools are not excluded on stable22 so running the psalm baseline update will add a bunch of new files. Example: https://github.com/kesselb/server/pull/3/files (pull request title says master but it was for stable22). Adding vendor-bin to .gitignore will fix this issue and is already done for stable23, stable24, master.

Failing tests:

1. samba: Is unreliable for quite a while. It's better with newer Nextcloud versions.
2. acceptance-app-files-tags: Is also failing on master sometimes. Looks like timing issues with the headless browser.
3. object-store-azure this looks bad indeed. However it's also failing for other stable22 ci runs. I don't think that has anything to do with a not installed development dependency.

[szaimen]

All right! Thanks for the detailed explanation! Merging then!