build(docs-infra): update @angular/cli to 10.0.0-next.3 (#36145)

Update the Angular CLI and Angular framework packages to latest `@next`
versions. Also, update the app to look more closely to how a newly
generated app with the latest CLI would look like.

PR Close #36145

goldens/size-tracking/aio-payloads.json

@@ -3,8 +3,8 @@
     "master": {
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-        "main-es2015": 450676,
-        "polyfills-es2015": 52688
+        "main-es2015": 452233,
+        "polyfills-es2015": 52685
       }
     }
   },
@@ -12,8 +12,8 @@
     "master": {
       "uncompressed": {
         "runtime-es2015": 2987,
-        "main-es2015": 452480,
-        "polyfills-es2015": 52631
+        "main-es2015": 452248,
+        "polyfills-es2015": 52628
       }
     }
   },
@@ -21,8 +21,8 @@
     "master": {
       "uncompressed": {
         "runtime-es2015": 3097,
-        "main-es2015": 428994,
-        "polyfills-es2015": 52631
+        "main-es2015": 428716,
+        "polyfills-es2015": 52628
       }
     }
   }