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/workspace-migration/factories/composite-column-action.factory.ts

@@ -72,7 +72,7 @@ export class CompositeColumnActionFactory extends ColumnActionAbstractFactory<Co
         columnType: fieldMetadataTypeToColumnType(property.type),
         enum: enumOptions,
         isNullable: fieldMetadata.isNullable || !property.isRequired,
-        isUnique: fieldMetadata.isUnique,
+        isUnique: fieldMetadata.isUnique ?? undefined,
         defaultValue: serializedDefaultValue,
         isArray:
           property.type === FieldMetadataType.MULTI_SELECT || property.isArray,

packages/twenty-server/src/engine/metadata-modules/workspace-migration/factories/ts-vector-column-action.factory.ts

@@ -13,14 +13,19 @@ import {
   WorkspaceMigrationColumnCreate,
 } from 'src/engine/metadata-modules/workspace-migration/workspace-migration.entity';
 
-export type TsVectorFieldMetadataType = FieldMetadataType.TS_VECTOR;
+export type TsVectorFieldMetadata =
+  FieldMetadataInterface<FieldMetadataType.TS_VECTOR> & {
+    generatedType?: 'STORED' | 'VIRTUAL';
+    asExpression?: string;
+  };
 
+export type TsVectorFieldMetadataType = FieldMetadataType.TS_VECTOR;
 @Injectable()
 export class TsVectorColumnActionFactory extends ColumnActionAbstractFactory<TsVectorFieldMetadataType> {
   protected readonly logger = new Logger(TsVectorColumnActionFactory.name);
 
   handleCreateAction(
-    fieldMetadata: FieldMetadataInterface<TsVectorFieldMetadataType>,
+    fieldMetadata: TsVectorFieldMetadata,
   ): WorkspaceMigrationColumnCreate[] {
     return [
       {
@@ -37,8 +42,8 @@ export class TsVectorColumnActionFactory extends ColumnActionAbstractFactory<TsV
   }
 
   handleAlterAction(
-    currentFieldMetadata: FieldMetadataInterface<TsVectorFieldMetadataType>,
-    alteredFieldMetadata: FieldMetadataInterface<TsVectorFieldMetadataType>,
+    currentFieldMetadata: TsVectorFieldMetadata,
+    alteredFieldMetadata: TsVectorFieldMetadata,
   ): WorkspaceMigrationColumnAlter[] {
     return [
       {

packages/twenty-server/src/engine/metadata-modules/workspace-migration/workspace-migration.factory.ts

@@ -11,7 +11,10 @@ import { CompositeColumnActionFactory } from 'src/engine/metadata-modules/worksp
 import { EnumColumnActionFactory } from 'src/engine/metadata-modules/workspace-migration/factories/enum-column-action.factory';
 import { MorphRelationColumnActionFactory } from 'src/engine/metadata-modules/workspace-migration/factories/morph-relation-column-action.factory';
 import { RelationColumnActionFactory } from 'src/engine/metadata-modules/workspace-migration/factories/relation-column-action.factory';
-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 {
   WorkspaceMigrationColumnAction,
   WorkspaceMigrationColumnActionType,
@@ -115,9 +118,9 @@ export class WorkspaceMigrationFactory {
     ]);
   }
 
-  createColumnActions(
+  createColumnActions<T extends FieldMetadataType = FieldMetadataType>(
     action: WorkspaceMigrationColumnActionType.CREATE,
-    fieldMetadata: FieldMetadataInterface,
+    fieldMetadata: FieldMetadataInterface<T>,
   ): WorkspaceMigrationColumnAction[];
 
   createColumnActions(
@@ -126,6 +129,12 @@ export class WorkspaceMigrationFactory {
     alteredFieldMetadata: FieldMetadataInterface,
   ): WorkspaceMigrationColumnAction[];
 
+  createColumnActions(
+    action: WorkspaceMigrationColumnActionType.ALTER,
+    currentFieldMetadata: FieldMetadataInterface,
+    alteredFieldMetadata: TsVectorFieldMetadata,
+  ): WorkspaceMigrationColumnAction[];
+
   createColumnActions(
     action:
       | WorkspaceMigrationColumnActionType.CREATE