### What?
If you have a custom field that sets the value of the field using the
`useField` hook on entry into a document - the `updatedAt` field would
be updated even when a non-owner tries to enter a locked document.
### Why?
When a field is updated in the edit view - we perform an update in
`form-state` to keep the doc in `payload-locked-documents` up to date
with the current editing status. The above scenario would hit this
update operation even on non-owner users because it was previously only
checking for `updateLastEdited` (which would get hit by the `setValue`
in the `useField` hook) so we also need to check to make sure the
current user entering a locked doc is also the owner of the document.
### How?
When performing an update to `payload-locked-documents` in
`buildFormState` - only perform the update if the current user is also
the owner of the locked document otherwise skip the `update` operation.
Fixes#8781
ebd3c025b7