Describe the feature

[example]
"spatialAnchorEnableOnlyWhenOwnerOnline_comment": "Whether Spatial Anchors should verifies that the system owner is online. default=false",
"spatialAnchorEnableOnlyWhenOwnerOnline": false

when it set to true, spatial anchor will load the chunk only if the system owned user is online

Reasons why it should be considered

when the endgame users finished their play and left, the spatial anchor was still working.

preventing offline user's chunks that are no longer in use (or may return later) from being unnecessarily loaded will be good for the server.

there are a lot of users who use spatial anchors, so it seemed better if we can use that config option than to disable it

thank you

Additional details

#7801

Duplicate of #7438