Connect logic in Workspace Entity Manager (#13078)

Large PR, sorry for that. Don't hesitate to reach me to have full
context (env. 500lines for integration and unit tests)

- Add connect logic in Workspace Entity Manager
- Update QueryDeepPartialEntity type to enable dev to use connect
- Add integration test on createOne / createMany
- Add unit test to cover main utils
- Remove feature flag on connect

closes https://github.com/twentyhq/core-team-issues/issues/1148
closes https://github.com/twentyhq/core-team-issues/issues/1147

packages/twenty-server/src/engine/api/graphql/workspace-schema-builder/utils/generate-fields.utils.ts

@@ -47,13 +47,11 @@ export const generateFields = <
   kind,
   options,
   typeFactory,
-  isRelationConnectEnabled = false,
 }: {
   objectMetadata: ObjectMetadataInterface;
   kind: T;
   options: WorkspaceBuildSchemaOptions;
   typeFactory: TypeFactory<T>;
-  isRelationConnectEnabled?: boolean;
 }): T extends InputTypeDefinitionKind
   ? GraphQLInputFieldConfigMap
   : // eslint-disable-next-line @typescript-eslint/no-explicit-any
@@ -80,7 +78,6 @@ export const generateFields = <
         kind,
         options,
         typeFactory,
-        isRelationConnectEnabled,
       });
     } else {
       generatedField = generateField({
@@ -168,7 +165,6 @@ const generateRelationField = <
   kind,
   options,
   typeFactory,
-  isRelationConnectEnabled,
 }: {
   fieldMetadata: FieldMetadataInterface<
     FieldMetadataType.RELATION | FieldMetadataType.MORPH_RELATION
@@ -176,7 +172,6 @@ const generateRelationField = <
   kind: T;
   options: WorkspaceBuildSchemaOptions;
   typeFactory: TypeFactory<T>;
-  isRelationConnectEnabled: boolean;
 }) => {
   const relationField = {};
 
@@ -208,11 +203,10 @@ const generateRelationField = <
   };
 
   if (
-    [InputTypeDefinitionKind.Create, InputTypeDefinitionKind.Update].includes(
+    [InputTypeDefinitionKind.Create].includes(
       kind as InputTypeDefinitionKind,
     ) &&
-    isDefined(fieldMetadata.relationTargetObjectMetadataId) &&
-    isRelationConnectEnabled
+    isDefined(fieldMetadata.relationTargetObjectMetadataId)
   ) {
     type = typeFactory.create(
       formatRelationConnectInputTarget(