Migrate metadata cache (#16030)

## Context
Deprecating legacy ObjectMetadata from cache in favor of flat entities.
Introducing utils to build byName/byNameSingular/byNamePlural in
isolated cases

## Next
- I had to introduce a util to build from flat to legacy
objectMetadataMaps, we should instead use flat maps directly when needed
(datasource, schema generation, etc)
- Deprecate metadata version in the cache
- Use the new cache strategy for flat entities with permissions and
feature flags and inject in the global datasource context

packages/twenty-server/src/engine/workspace-manager/dev-seeder/dev-seeder.module.ts

@@ -15,7 +15,6 @@ import { ObjectMetadataModule } from 'src/engine/metadata-modules/object-metadat
 import { ObjectPermissionModule } from 'src/engine/metadata-modules/object-permission/object-permission.module';
 import { RoleModule } from 'src/engine/metadata-modules/role/role.module';
 import { UserRoleModule } from 'src/engine/metadata-modules/user-role/user-role.module';
-import { WorkspaceMetadataCacheModule } from 'src/engine/metadata-modules/workspace-metadata-cache/workspace-metadata-cache.module';
 import { WorkspacePermissionsCacheModule } from 'src/engine/metadata-modules/workspace-permissions-cache/workspace-permissions-cache.module';
 import { WorkspaceCacheStorageModule } from 'src/engine/workspace-cache-storage/workspace-cache-storage.module';
 import { WorkspaceDataSourceModule } from 'src/engine/workspace-datasource/workspace-datasource.module';
@@ -45,7 +44,6 @@ import { WorkspaceSyncMetadataModule } from 'src/engine/workspace-manager/worksp
     ObjectPermissionModule,
     WorkspacePermissionsCacheModule,
     WorkspaceManyOrAllFlatEntityMapsCacheModule,
-    WorkspaceMetadataCacheModule,
   ],
   exports: [DevSeederService],
   providers: [