[PB-6531]: resolve same-name items within a move collision batch

[terrerox]

Description

Comes from the review comment on #2148: if you restore several files with the same name from the trash into a folder that already has that name, the collision dialog handled each file as if it were alone, and the second one failed.

• Keep both: same-name files are now renamed one after the other (report (1).pdf, report (2).pdf). Before, both got report (1).pdf.
• Replace: the existing file is trashed once, the first file takes its place, and the others are kept with a numbered name.
• One by one: "Replace" on the second file did nothing. Now it always restores the file, and "apply to all" is offered whenever more than one file is pending.
• A file only leaves the trash view if its move actually worked.

Related Issues

Related Pull Requests

• Previous: [PB-6531]: merge folder uploads into the existing folder on skip #2129
• Review comment: [PB-6531]: match name collisions by name and type and batch their resolution #2148

Checklist

• Changes have been tested locally.
• Unit tests have been written or updated as necessary.
• The code adheres to the repository's coding standards.
• Relevant documentation has been added or updated.
• No new warnings or errors have been introduced.
• SonarCloud issues have been reviewed and addressed.
• QA Passed

Testing Process

[cloudflare-workers-and-pages]

Deploying drive-web with    Cloudflare Pages

Latest commit:	8b4af77
Status:	⚡️  Build in progress...

View logs

[sonarqubecloud]

Quality Gate passed

Issues
2 New issues
0 Accepted issues

Measures
0 Security Hotspots
99.2% Coverage on New Code
0.0% Duplication on New Code

See analysis details on SonarQube Cloud