Morph Relations : deleteOneField (#13349)

This PR adapts teh deleteOneField to make sure morph relations can be
deleted, either
- from a relation type, 
- or from a morph relation type (which is the most obvious case).

This PR covers 
- the deletion of fieldMetadata 
- and the migrationof workspace schemas, by using the already existing
definition of relation migrations

This PR implements a new test suite: "Delete Object metadata with morph
relation" and completes the other test suites for FieldMetadata and
ObjectMetadata creation/deletion.

Last, we added a nitpick from @paul I forgot on a previous PR on
process-nested-realtion-v2

Fixes https://github.com/twentyhq/core-team-issues/issues/1197

packages/twenty-server/src/engine/metadata-modules/field-metadata/utils/are-field-metadatas-type-relation-or-morph-relation.util.ts

@@ -0,0 +1,20 @@
+import { FieldMetadataType } from 'twenty-shared/types';
+
+import { FieldMetadataEntity } from 'src/engine/metadata-modules/field-metadata/field-metadata.entity';
+import { isFieldMetadataTypeMorphRelation } from 'src/engine/metadata-modules/field-metadata/utils/is-field-metadata-type-morph-relation.util';
+import { isFieldMetadataTypeRelation } from 'src/engine/metadata-modules/field-metadata/utils/is-field-metadata-type-relation.util';
+
+export const areFieldMetadatasTypeRelationOrMorphRelation = (
+  fieldMetadatas: FieldMetadataEntity[],
+): fieldMetadatas is Array<
+  FieldMetadataEntity &
+    FieldMetadataEntity<
+      FieldMetadataType.MORPH_RELATION | FieldMetadataType.RELATION
+    >
+> => {
+  return fieldMetadatas.every(
+    (fieldMetadata) =>
+      isFieldMetadataTypeRelation(fieldMetadata) ||
+      isFieldMetadataTypeMorphRelation(fieldMetadata),
+  );
+};

packages/twenty-server/src/engine/metadata-modules/field-metadata/utils/is-field-metadata-type-morph-relation.util.ts

@@ -0,0 +1,10 @@
+import { FieldMetadataType } from 'twenty-shared/types';
+
+import { FieldMetadataEntity } from 'src/engine/metadata-modules/field-metadata/field-metadata.entity';
+
+export const isFieldMetadataTypeMorphRelation = (
+  fieldMetadata: FieldMetadataEntity,
+): fieldMetadata is FieldMetadataEntity &
+  FieldMetadataEntity<FieldMetadataType.MORPH_RELATION> => {
+  return fieldMetadata.type === FieldMetadataType.MORPH_RELATION;
+};

packages/twenty-server/src/engine/metadata-modules/field-metadata/utils/is-field-metadata-type-relation.util.ts

@@ -0,0 +1,10 @@
+import { FieldMetadataType } from 'twenty-shared/types';
+
+import { FieldMetadataEntity } from 'src/engine/metadata-modules/field-metadata/field-metadata.entity';
+
+export const isFieldMetadataTypeRelation = (
+  fieldMetadata: FieldMetadataEntity,
+): fieldMetadata is FieldMetadataEntity &
+  FieldMetadataEntity<FieldMetadataType.RELATION> => {
+  return fieldMetadata.type === FieldMetadataType.RELATION;
+};