Revert bulk update patch

- Revert patch #2311
- Keep the refactor done to qsFiltersRoot
- Keep the refactor done to the items tables
- Add tests that now work with pg-safeupdate as a result

src/PostgREST/Request/DbRequestBuilder.hs

@@ -318,7 +318,7 @@ mutateRequest mutation schema tName ApiRequest{..} pkCols readReq = mapLeft ApiR
   case mutation of
     MutationCreate ->
       Right $ Insert qi iColumns body ((,) <$> iPreferResolution <*> Just confCols) [] returnings
-    MutationUpdate -> Right $ Update qi iColumns body combinedLogic pkCols iTopLevelRange rootOrder returnings
+    MutationUpdate -> Right $ Update qi iColumns body combinedLogic iTopLevelRange rootOrder returnings
     MutationSingleUpsert ->
         if null qsLogic &&
            qsFilterFields == S.fromList pkCols &&

src/PostgREST/Request/MutateQuery.hs

@@ -31,7 +31,6 @@ data MutateQuery
       , updCols   :: S.Set FieldName
       , updBody   :: Maybe LBS.ByteString
       , where_    :: [LogicTree]
-      , pkFilters :: [FieldName]
       , mutRange  :: NonnegRange
       , mutOrder  :: [OrderTerm]
       , returning :: [FieldName]