Merge pull request #31029 from nextcloud/expose-extra-emails-in-dav

Expose additional emails in {DAV:}alternate-URI-set

diff --cc apps/dav/appinfo/v1/caldav.php
Simple merge

diff --cc apps/dav/appinfo/v1/carddav.php
Simple merge

diff --cc apps/dav/lib/Command/CreateCalendar.php
Simple merge

diff --cc apps/dav/lib/RootCollection.php
Simple merge

diff --cc apps/dav/tests/unit/CalDAV/AbstractCalDavBackend.php
Simple merge

diff --cc apps/dav/tests/unit/CardDAV/CardDavBackendTest.php
Simple merge