Fix getting the file owner for share recipients

[JammingBen]

Description

Fixed a bug where a wrong file owner was retrieved when saving version authors. This scenario happened for share recipients if they had a file with the same name as the shared one.

Related Issue

• Fixes Editing a shared file sometimes fails to save the author with the versions #39662

Types of changes

• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Database schema changes (next release will require increase of minor version instead of patch)
• Breaking change (fix or feature that would cause existing functionality to change)
• Technical debt
• Tests only (no source changes)

Checklist:

• Code changes
• Unit tests added
• Acceptance tests added
• Documentation ticket raised:
• Changelog item, see TEMPLATE

[sonarcloud]

Kudos, SonarCloud Quality Gate passed!   

0 Bugs
0 Vulnerabilities
0 Security Hotspots
0 Code Smells

100.0% Coverage
0.0% Duplication

[IljaN]

LGTM 👍

[phil-davis]

See PR #39675 - that has 2 new scenarios that demonstrate this issue, and they pass with this code.

I can't just cherry-pick those in here, because they need various test code from master that is not in the release-10.9.1 branch. If we want, we could merge #39639 to release-10.9.1 to get all that test code into the release branch. But it might be best not to do that - we might accidentally cause some merge problem back to master...

When we merge back things from release-10.9.1 to master (however we do that in a controlled way), we can also apply the test scenarios to master.