handle copy of live photos

[ArtificialOwl]

trafficstars

• uses of handleMove() during the BeforeNodeCopiedEvent to check the doability of copying both files.
• handleCopy() called during the NodeCopiedEvent to generate a copy of the linked file.

[ArtificialOwl]

/backport to stable28

[ArtificialOwl]

thanks @icewind1991 fixed last comment, squashed & rebased

[backportbot[bot]]

The backport to stable28 failed. Please do this backport manually.

# Switch to the target branch and update it
git checkout stable28
git pull origin stable28

# Create the new backport branch
git checkout -b backport/42170/stable28

# Cherry pick the change from the commit sha1 of the change against the default branch
# This might cause conflicts, resolve them
git cherry-pick 467c84ec

# Push the cherry pick commit to the remote repository and open a pull request
git push origin backport/42170/stable28

Error: No changes found in backport branch

---

Learn more about backports at https://docs.nextcloud.com/server/stable/go.php?to=developer-backports.

[ArtificialOwl]

@artonge based on the size of the changes and the need for this feature, do we want to backport to 28 ?

[artonge]

I would say no, but not for me to decide, @sorbaugh

[squid-f]

Hi. Just updated to 29.0.3 and the error persists : AbortedEventException Cannot delete the video part of a live photo delete process aborted