update to Nextcloud 29

[szaimen]

Tasks

TODO:

• [ ] Wait for at least 29.0.1

Issues:

• [ ] https://github.com/nextcloud/server/issues?q=is%3Aopen+is%3Aissue++label%3A29-feedback+
• [ ] https://github.com/nextcloud/server/pull/27613: rather check for config owner again but add config flag to specify the user in config.php
• [ ] https://github.com/nextcloud/server/issues/45033#issuecomment-2079392285 https://github.com/nextcloud/all-in-one/discussions/4635

Apps not compatible:

• [ ] increase aio version to 29
• [ ] other bundled apps
• [ ] further apps

Test:

• [ ] test new instance?
• [ ] check if all included features work
  • [ ] ClamAV
  • [ ] Collabora
  • [ ] Fulltextsearch
  • [ ] Imaginary (for previews of heic, heif, illustrator, pdf, svg, tiff and webp. Imaginary is currently incompatible with server-side-encryption)
  • [ ]
  • [ ] talk recording
• [ ] check admin overview
• [ ] check each other overview
• [ ] check if nextcloud-aio app works
• [ ] remove potentially added note in the aio interface about nextcloud 28 by changing newMajorVersion to ''
• [ ] https://github.com/nextcloud/all-in-one/issues/3573
• [ ] ...