chore: angular test apps serve in dev mode (#27270)

Issue number: N/A

---------

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## What is the current behavior?
<!-- Please describe the current behavior that you are modifying. -->

When adding the Angular 16 test infrastructure, I accidentally regressed
ng14/ng15 test apps to run in production mode when serving locally.

This resulted in slower serve time and the vendor code being code split,
making it difficult to debug locally.

## What is the new behavior?
<!-- Please describe the behavior or changes that are being added by
this PR. -->

- Angular test apps run in dev mode when served locally
- Angular test apps run in prod mode when built with `npm run build`

## Does this introduce a breaking change?

- [ ] Yes
- [x] No

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and migration path for existing applications below. -->


## Other information

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screenshots of how the component looks before and after the change. -->

We can share the same `angular.json` across all the major versions of
Angular we currently support.

angular/test/base/angular.json

@@ -13,7 +13,6 @@
         "build": {
           "builder": "@angular-devkit/build-angular:browser",
           "options": {
-            "aot": true,
             "outputPath": "dist/test-app/browser",
             "index": "src/index.html",
             "main": "src/main.ts",
@@ -64,8 +63,17 @@
                   "maximumWarning": "6kb"
                 }
               ]
+            },
+            "development": {
+              "buildOptimizer": false,
+              "optimization": false,
+              "vendorChunk": true,
+              "extractLicenses": false,
+              "sourceMap": true,
+              "namedChunks": true
             }
-          }
+          },
+          "defaultConfiguration": "production"
         },
         "serve": {
           "builder": "@angular-devkit/build-angular:dev-server",
@@ -75,8 +83,12 @@
           "configurations": {
             "production": {
               "browserTarget": "test-app:build:production"
+            },
+            "development": {
+              "browserTarget": "test-app:build:development"
             }
-          }
+          },
+          "defaultConfiguration": "development"
         },
         "extract-i18n": {
           "builder": "@angular-devkit/build-angular:extract-i18n",
@@ -136,9 +148,7 @@
     }
   },
   "cli": {
-    "schematicCollections": [
-      "@angular-eslint/schematics"
-    ],
+    "schematicCollections": ["@angular-eslint/schematics"],
     "cache": {
       "enabled": false
     }