build(docs-infra): switch docs examples to Ivy (#36143)

The docs examples are switched to Ivy. On CI, the tests are run with
both Ivy and ViewEngine.

Partially addresses:
[FW-1609](https://angular-team.atlassian.net/browse/FW-1609)

PR Close #36143

.circleci/config.yml

@@ -455,7 +455,7 @@ jobs:
 
   test_docs_examples:
     parameters:
-      ivy:
+      viewengine:
         type: boolean
         default: false
     executor:
@@ -471,7 +471,7 @@ jobs:
         # Run examples tests. The "CIRCLE_NODE_INDEX" will be set if "parallelism" is enabled.
         # Since the parallelism is set to "5", there will be five parallel CircleCI containers.
         # with either "0", "1", etc as node index. This can be passed to the "--shard" argument.
-      - run: yarn --cwd aio example-e2e --setup --local <<# parameters.ivy >>--ivy<</ parameters.ivy >> --cliSpecsConcurrency=5 --shard=${CIRCLE_NODE_INDEX}/${CIRCLE_NODE_TOTAL} --retry 2
+      - run: yarn --cwd aio example-e2e --setup --local <<# parameters.viewengine >>--viewengine<</ parameters.viewengine >> --cliSpecsConcurrency=5 --shard=${CIRCLE_NODE_INDEX}/${CIRCLE_NODE_TOTAL} --retry 2
 
   # This job should only be run on PR builds, where `CI_PULL_REQUEST` is not `false`.
   aio_preview:
@@ -823,8 +823,8 @@ workflows:
           requires:
             - build-npm-packages
       - test_docs_examples:
-          name: test_docs_examples_ivy
-          ivy: true
+          name: test_docs_examples_viewengine
+          viewengine: true
           requires:
             - build-npm-packages
       - aio_preview:
@@ -851,7 +851,7 @@ workflows:
             - test_aio_local
             - test_aio_local_viewengine
             - test_docs_examples
-            - test_docs_examples_ivy
+            - test_docs_examples_viewengine
             # Get the artifacts to publish from the build-packages-dist job
             # since the publishing script expects the legacy outputs layout.
             - build-npm-packages