Refactor builder to embed Object validation create/delete/update (#13934)

# Introduction
Moving validation directly in the builder that has the perfect
granularity to do it.
When importing we won't have to infer and dispatch on the operation
nature ( update delete create ) and validate accordingly

## Objects
Only migrated object validation for the moment even though create object
involves a validate flat field metadata creation call too

## TODO
- improve `otherFlatObjectMetadataMapsToValidate` naming too vague

## Next
- handle fields validation within fields actions build
- Unit test coverage validation issue on builder and validate
- integration test plugging with new feature flag

## Manual tested
- Update
- Delete
- Create TODO

packages/twenty-server/src/engine/metadata-modules/object-metadata/object-metadata.module.ts

@@ -43,8 +43,7 @@ import { WorkspacePermissionsCacheModule } from 'src/engine/metadata-modules/wor
 import { WorkspaceCacheStorageModule } from 'src/engine/workspace-cache-storage/workspace-cache-storage.module';
 import { WorkspaceDataSourceModule } from 'src/engine/workspace-datasource/workspace-datasource.module';
 import { WorkspaceMigrationRunnerModule } from 'src/engine/workspace-manager/workspace-migration-runner/workspace-migration-runner.module';
-import { WorkspaceMigrationBuilderV2Module } from 'src/engine/workspace-manager/workspace-migration-v2/workspace-migration-builder-v2/workspace-migration-builder-v2.module';
-import { WorkspaceMigrationRunnerV2Module } from 'src/engine/workspace-manager/workspace-migration-v2/workspace-migration-runner-v2/workspace-migration-runner-v2.module';
+import { WorkspaceMigrationV2Module } from 'src/engine/workspace-manager/workspace-migration-v2/workspace-migration-v2.module';
 
 @Module({
   imports: [
@@ -69,8 +68,7 @@ import { WorkspaceMigrationRunnerV2Module } from 'src/engine/workspace-manager/w
         WorkspaceMetadataCacheModule,
         WorkspaceDataSourceModule,
         FeatureFlagModule,
-        WorkspaceMigrationBuilderV2Module,
-        WorkspaceMigrationRunnerV2Module,
+        WorkspaceMigrationV2Module,
       ],
       services: [
         ObjectMetadataService,