Deprecate FieldMetadataInterface (#13264)

# Introduction

From the moment replaced the FieldMetadataInterface definition to:
```ts
import { FieldMetadataType } from 'twenty-shared/types';

import { FieldMetadataEntity } from 'src/engine/metadata-modules/field-metadata/field-metadata.entity';

export type FieldMetadataInterface<
  T extends FieldMetadataType = FieldMetadataType,
> = FieldMetadataEntity<T>;
```
After this PR merge will create a new one removing the type and
replacing it to `FieldMetadataEntity`.
Did not renamed it here to avoid conflicts on naming + type issues fixs
within the same PR

## Field metadata entity RELATION or MORPH
Relations fields cannot be null for those field metadata entity instance
anymore, but are never for the others see
`packages/twenty-server/src/engine/metadata-modules/field-metadata/types/field-metadata-entity-test.type.ts`
( introduced TypeScript tests )

## Concerns
- TS_VECTOR is the most at risk with the `generatedType` and
`asExpression` removal from interface

## What's next
- `FielMetadataInterface` removal and rename ( see introduction )
- Depcrecating `ObjectMetadataInterface`
- Refactor `FieldMetadataEntity` optional fiels to be nullable only
- TO DIG `never` occurences on settings, defaultValue etc
- Some interfaces will be replaced by the `FlatFieldMetadata` when
deprecating the current sync and comparators tools

packages/twenty-server/src/engine/metadata-modules/search-vector/search-vector.service.ts

@@ -5,8 +5,6 @@ import { FieldMetadataType } from 'twenty-shared/types';
 import { isDefined } from 'twenty-shared/utils';
 import { QueryRunner, Repository } from 'typeorm';
 
-import { FieldMetadataInterface } from 'src/engine/metadata-modules/field-metadata/interfaces/field-metadata.interface';
-
 import { SEARCH_VECTOR_FIELD } from 'src/engine/metadata-modules/constants/search-vector-field.constants';
 import { FieldMetadataEntity } from 'src/engine/metadata-modules/field-metadata/field-metadata.entity';
 import { IndexMetadataService } from 'src/engine/metadata-modules/index-metadata/index-metadata.service';
@@ -14,7 +12,10 @@ import { IndexType } from 'src/engine/metadata-modules/index-metadata/types/inde
 import { CreateObjectInput } from 'src/engine/metadata-modules/object-metadata/dtos/create-object.input';
 import { DEFAULT_LABEL_IDENTIFIER_FIELD_NAME } from 'src/engine/metadata-modules/object-metadata/object-metadata.constants';
 import { ObjectMetadataEntity } from 'src/engine/metadata-modules/object-metadata/object-metadata.entity';
-import { TsVectorColumnActionFactory } from 'src/engine/metadata-modules/workspace-migration/factories/ts-vector-column-action.factory';
+import {
+  TsVectorColumnActionFactory,
+  TsVectorFieldMetadata,
+} from 'src/engine/metadata-modules/workspace-migration/factories/ts-vector-column-action.factory';
 import { generateMigrationName } from 'src/engine/metadata-modules/workspace-migration/utils/generate-migration-name.util';
 import {
   WorkspaceMigrationColumnActionType,
@@ -23,6 +24,7 @@ import {
 import { WorkspaceMigrationFactory } from 'src/engine/metadata-modules/workspace-migration/workspace-migration.factory';
 import { WorkspaceMigrationService } from 'src/engine/metadata-modules/workspace-migration/workspace-migration.service';
 import { computeTableName } from 'src/engine/utils/compute-table-name.util';
+import { isFieldMetadataEntityOfType } from 'src/engine/utils/is-field-metadata-of-type.util';
 import { CUSTOM_OBJECT_STANDARD_FIELD_IDS } from 'src/engine/workspace-manager/workspace-sync-metadata/constants/standard-field-ids';
 import {
   FieldTypeAndNameMetadata,
@@ -66,6 +68,17 @@ export class SearchVectorService {
       isNullable: true,
     });
 
+    if (
+      !isFieldMetadataEntityOfType(
+        searchVectorFieldMetadata,
+        FieldMetadataType.TS_VECTOR,
+      )
+    ) {
+      throw new Error(
+        'Should never occur, created searchVectorFieldMetadata is not a TS_VECTOR field',
+      );
+    }
+
     const searchableFieldForCustomObject =
       createdObjectMetadata.labelIdentifierFieldMetadataId
         ? createdObjectMetadata.fields.find(
@@ -94,7 +107,6 @@ export class SearchVectorService {
           action: WorkspaceMigrationTableActionType.ALTER,
           columns: this.tsVectorColumnActionFactory.handleCreateAction({
             ...searchVectorFieldMetadata,
-            defaultValue: undefined,
             generatedType: 'STORED',
             asExpression: getTsVectorColumnExpressionFromFields([
               {
@@ -102,8 +114,7 @@ export class SearchVectorService {
                 name: searchableFieldForCustomObject.name,
               },
             ]),
-            options: undefined,
-          } as FieldMetadataInterface<FieldMetadataType.TS_VECTOR>),
+          }),
         },
       ],
       queryRunner,
@@ -159,8 +170,8 @@ export class SearchVectorService {
                 fieldMetadataNameAndTypeForSearch,
               ),
               generatedType: 'STORED', // Not stored on fieldMetadata
-              options: undefined,
-            },
+              options: null,
+            } as TsVectorFieldMetadata,
           ),
         },
       ],