Feature/53428 auto create collection on upload

[salmart-dev]

• Resolves: Syncing: Automatically create folder structure when uploading files #53428

Summary

This PR adds the ability for clients to ask the WebDAV server to create nested directories while uploading files if they don't exist.

NOTE: this functionality is not WebDAV compliant. For this reason, to enable this behaviour the header X-Create-Tree: enable must be sent within the PUT request that uploads the file.

TODO

• Add documentation

Checklist

• Code is properly formatted
• Sign-off message is added to all commits
• Tests (unit, integration, api and/or acceptance) are included
• Documentation (manuals or wiki) has been updated or is not required
  • Add new X-NC-WebDAV-Auto-Mkcol header documentation#13303
• Backports requested where applicable (ex: critical bugfixes)