fix(@schematics/angular): use angular build fallback version

Author: raashish1601

packages/schematics/angular/migrations/use-application-builder/migration.ts

@@ -273,7 +273,7 @@ function updateProjects(tree: Tree, context: SchematicContext) {
       // Add direct @angular/build dependencies and remove @angular-devkit/build-angular
       const buildAngularVersion =
         getDependency(tree, '@angular-devkit/build-angular')?.version ??
-        latestVersions.DevkitBuildAngular;
+        latestVersions.AngularBuild;
       rules.push(
         addDependency('@angular/build', buildAngularVersion, {
           type: DependencyType.Dev,

packages/schematics/angular/migrations/use-application-builder/migration_spec.ts

@@ -9,6 +9,7 @@
 import { JsonObject } from '@angular-devkit/core';
 import { EmptyTree } from '@angular-devkit/schematics';
 import { SchematicTestRunner, UnitTestTree } from '@angular-devkit/schematics/testing';
+import { latestVersions } from '../../utility/latest-versions';
 import { Builders, ProjectType, WorkspaceSchema } from '../../utility/workspace-models';
 
 function createWorkSpaceConfig(tree: UnitTestTree) {
@@ -467,6 +468,14 @@ describe(`Migration to use the application builder`, () => {
     expect(devDependencies['@angular-devkit/build-angular']).toBeUndefined();
   });
 
+  it('should use the latest "@angular/build" version when no builder is installed', async () => {
+    const newTree = await schematicRunner.runSchematic(schematicName, {}, tree);
+
+    const { devDependencies } = JSON.parse(newTree.readContent('/package.json'));
+    expect(devDependencies['@angular/build']).toBe(latestVersions.AngularBuild);
+    expect(devDependencies['@angular-devkit/build-angular']).toBeUndefined();
+  });
+
   it('should preserve an existing "@angular/build" version when migrating', async () => {
     tree.overwrite(
       '/package.json',