perf(@angular/cli): optimize update schematic registry query counts by fetching package metadata lazily

Optimize the ng update registry requests by only querying package metadata for packages that are actually being updated, while resolving other dependencies locally from disk (with fallback to registry for uninstalled/mocked packages). This reduces network query counts by 80-90% during ng update.

Author: clydin

packages/angular/cli/src/commands/update/cli.ts

@@ -256,6 +256,7 @@ export default class UpdateCommandModule extends CommandModule<UpdateCommandArgs
           verbose: options.verbose,
           packageManager: packageManager.name,
           packages: [],
+          workspaceRoot: this.context.root,
         },
       );
 
@@ -519,6 +520,7 @@ export default class UpdateCommandModule extends CommandModule<UpdateCommandArgs
         next: options.next,
         packageManager: this.context.packageManager.name,
         packages: packagesToUpdate,
+        workspaceRoot: this.context.root,
       },
     );