fix(dav): add missing search_supports_creation_time and search_supports_upload_time to Capabilities return type

[cristianscheid]

• Resolves: #

Summary

Fix psalm error by adding missing search_supports_creation_time and search_supports_upload_time to Capabilities return type

Follow-up to #58562

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

[joshtrichards]

This will need backporting too, at least if the failed backports on #58562 are dealt with. ;-)

[cristianscheid]

This will need backporting too, at least if the failed backports on #58562 are dealt with. ;-)

@joshtrichards For stable33 this backport should fix it: #58694. I've adjusted it to avoid the psalm errors.

[cristianscheid]

Just documenting that stable29, stable30, stable31, and stable32 should now also be fixed by the PRs below (already merged), preventing the psalm errors.

#58706 [stable29]
#58691 [stable30]
#58692 [stable31]
#58693 [stable32]