[metadata] fix soft delete for standard objects missing deletedAt fieldMetadata (#7017)

This https://github.com/twentyhq/twenty/pull/7006 introduced a
regression.

The goal was to set "isSoftDeletable" to all standard objects but it was
done at the wrong level, meaning it was setting the boolean correctly
but not creating the corresponding fieldMetadata.

I took the occasion to update the new graphql query runner to use that
boolean and automatically add a filter on soft delete in case it's true.

Also adding **IsQueryRunnerTwentyORMEnabled** by default in the seeds

packages/twenty-server/src/engine/twenty-orm/interfaces/workspace-entity-metadata-args.interface.ts

@@ -64,5 +64,5 @@ export interface WorkspaceEntityMetadataArgs {
   /**
    * Enable soft delete.
    */
-  readonly softDelete?: boolean;
+  readonly softDelete: boolean;
 }