fix(files_reminder): passed reminder handling

[skjnldsv]

• Resolves: [Bug]: Once a reminder for a file has passed, it does not disappear and cannot be deleted #59194

Summary

This PR solved two logic issues

1. we still return passed reminder from the API. We should just assume passed ones are void and basically gone
2. we assumed a 404 on reminder clear request was an issue, but that's just expected outcome. We can safely disregard this.

Checklist

• Code is properly formatted
• Sign-off message is added to all commits
• Tests (unit, integration, api and/or acceptance) are included
• Screenshots before/after for front-end changes
• Documentation (manuals or wiki) has been updated or is not required
• Backports requested where applicable (ex: critical bugfixes)
• Labels added where applicable (ex: bug/enhancement, 3. to review, feature component)
• Milestone added for target branch/version (ex: 32.x for stable32)

AI (if applicable)

• The content of this PR was partly or fully generated using AI

[skjnldsv]

/backport to stable33

[szaimen]

🐘

[skjnldsv]

/compile rebase