Fix seeds for local workspace and newly created workspaces (#2333)

* Update metadata/data seeds

* fix

* fix

* move seeding into a transaction

* add no-non-null-assertion

---------

Co-authored-by: Charles Bochet <charlesBochet@users.noreply.github.com>

server/src/metadata/data-source/data-source.service.ts

@@ -88,9 +88,6 @@ export class DataSourceService implements OnModuleInit, OnModuleDestroy {
 
     await workspaceDataSource.initialize();
 
-    // Set search path to workspace schema for raw queries
-    await workspaceDataSource?.query(`SET search_path TO ${schema};`);
-
     this.dataSources.set(workspaceId, workspaceDataSource);
 
     return workspaceDataSource;