feat(@schematics/angular): add migration to remove lazyModules configuration option

Author: alan-agius4

packages/schematics/angular/migrations/update-12/update-angular-config.ts

@@ -18,6 +18,7 @@ export default function (): Rule {
 
       for (const [, options] of allTargetOptions(target)) {
         delete options.experimentalRollupPass;
+        delete options.lazyModules;
       }
     }
   });