fix(dav): return RFC 4791 no-uid-conflict on duplicate calendar UID

[SebastianKrupinski]

• Resolves: #

Summary

• Original Community PR: fix(dav): return RFC 4791 no-uid-conflict on duplicate calendar UID #61640
• Modified the CalDAV and CardDAV backend create to use new serializable exception type that returns a dav response as per RFC
• Modified the CalDAV and CardDAV backend move to use new serializable exception type that returns a dav response as per RFC
• RFC 4791 (CalDAV) defines the CALDAV:no-uid-conflict precondition. It ensures that within a calendar collection, there cannot be two different resources containing iCalendar objects with the same UID.
• RFC 6352 (CardDAV) defines the analogous CARDDAV:no-uid-conflict precondition for address books. It ensures that within an address book collection, there cannot be two different vCard resources with the same UID.

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

[SebastianKrupinski]

/backport to stable34

[SebastianKrupinski]

/backport to stable33

[SebastianKrupinski]

/backport to stable32