/tags view performance

[marcelklehr]

Describe the bug
When you have a lot of photos tagged, opening the /tags view will trigger lots of long running requests.

To Reproduce
Steps to reproduce the behavior:

1. Upload lots of photos
2. Tag them all with multiple tags
3. Go to /tags view
4. See requests in network console

Expected behavior
The app should not request all photos per tag at once.

Related PRs

• SystemTags endpoint to return tags used by a user with meta data server#37961
• use more efficient tag retrieval on DAV report request server#37969
• Adapt to SystemTags optimizations on server #1770