Remove duplicates from ACLs

Please see issue

By doing this change, we are making the behavior consistent with how we handle other similar scenarios. i.e. if duplicate legaltags or tags are provided in the record create request, they are automatically ignored and record gets created with non-duplicate values. This change will make the behavior consistent with acls

This is affecting new PATCH api when a user tries to modify tags for a record that has duplicates in the acls. This issue itself needs to be addressed separately, this change is to fix having duplicates to begin with.