In this PR:
- Remove deactivated objects from ActivityTargetInlineCell record picker
- Prevent users to deactivate createdAt, updatedAt, deletedAt fields on
any objects
Still left:
- write unit tests on the assert utils
- write integration tests on field metadata service
- prevent users to deactivate createdAt, updatedAt, deletedAt on FE
isLabelSyncedWithName should be nullable for fieldMetadata, as it is for
objectMetadata.
+ Adding missing validation on label and name sync in
fieldMetadataService for creation and update
+ adding metadata tests
