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/twenty-orm/twenty-orm.module.ts

@@ -5,11 +5,11 @@ import { FeatureFlagModule } from 'src/engine/core-modules/feature-flag/feature-
 import { TwentyConfigModule } from 'src/engine/core-modules/twenty-config/twenty-config.module';
 import { WorkspaceEntity } from 'src/engine/core-modules/workspace/workspace.entity';
 import { DataSourceModule } from 'src/engine/metadata-modules/data-source/data-source.module';
+import { WorkspaceManyOrAllFlatEntityMapsCacheModule } from 'src/engine/metadata-modules/flat-entity/services/workspace-many-or-all-flat-entity-maps-cache.module';
 import { ObjectMetadataEntity } from 'src/engine/metadata-modules/object-metadata/object-metadata.entity';
 import { PermissionsModule } from 'src/engine/metadata-modules/permissions/permissions.module';
 import { RoleTargetsEntity } from 'src/engine/metadata-modules/role/role-targets.entity';
 import { WorkspaceFeatureFlagsMapCacheModule } from 'src/engine/metadata-modules/workspace-feature-flags-map-cache/workspace-feature-flags-map-cache.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 { entitySchemaFactories } from 'src/engine/twenty-orm/factories';
 import { EntitySchemaFactory } from 'src/engine/twenty-orm/factories/entity-schema.factory';
@@ -30,7 +30,7 @@ import { PgPoolSharedModule } from './pg-shared-pool/pg-shared-pool.module';
     ]),
     DataSourceModule,
     WorkspaceCacheStorageModule,
-    WorkspaceMetadataCacheModule,
+    WorkspaceManyOrAllFlatEntityMapsCacheModule,
     PermissionsModule,
     WorkspaceFeatureFlagsMapCacheModule,
     WorkspacePermissionsCacheModule,