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/workspace-migration-v2/workspace-migration-runner-v2/workspace-migration-runner-v2.module.ts

@@ -5,7 +5,6 @@ import { TypeORMModule } from 'src/database/typeorm/typeorm.module';
 import { FeatureFlagModule } from 'src/engine/core-modules/feature-flag/feature-flag.module';
 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 { WorkspaceMetadataCacheModule } from 'src/engine/metadata-modules/workspace-metadata-cache/workspace-metadata-cache.module';
 import { WorkspaceMetadataVersionModule } from 'src/engine/metadata-modules/workspace-metadata-version/workspace-metadata-version.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';
@@ -20,7 +19,6 @@ import { WorkspaceMigrationRunnerV2Service } from 'src/engine/workspace-manager/
     DataSourceModule,
     WorkspaceMetadataVersionModule,
     WorkspacePermissionsCacheModule,
-    WorkspaceMetadataCacheModule,
     WorkspaceSchemaMigrationRunnerActionHandlersModule,
     WorkspaceManyOrAllFlatEntityMapsCacheModule,
     DiscoveryModule,

packages/twenty-server/src/engine/workspace-manager/workspace-migration-v2/workspace-migration-v2.module.ts

@@ -1,6 +1,5 @@
 import { Module } from '@nestjs/common';
 
-import { WorkspaceMetadataCacheModule } from 'src/engine/metadata-modules/workspace-metadata-cache/workspace-metadata-cache.module';
 import { WorkspaceMigrationBuildOrchestratorService } from 'src/engine/workspace-manager/workspace-migration-v2/services/workspace-migration-build-orchestrator.service';
 import { WorkspaceMigrationValidateBuildAndRunService } from 'src/engine/workspace-manager/workspace-migration-v2/services/workspace-migration-validate-build-and-run-service';
 import { WorkspaceMigrationBuilderV2Module } from 'src/engine/workspace-manager/workspace-migration-v2/workspace-migration-builder-v2/workspace-migration-builder-v2.module';
@@ -10,7 +9,6 @@ import { WorkspaceMigrationRunnerV2Module } from 'src/engine/workspace-manager/w
   imports: [
     WorkspaceMigrationBuilderV2Module,
     WorkspaceMigrationRunnerV2Module,
-    WorkspaceMetadataCacheModule,
   ],
   providers: [
     WorkspaceMigrationValidateBuildAndRunService,