ci(docs-infra): run cli docs examples concurrently (angular#29103)

PR Close angular#29103

Author: devversion

.circleci/config.yml

@@ -332,6 +332,7 @@ jobs:
       # Needed because the example e2e tests depend on Chrome.
       - image: *browsers_docker_image
     parallelism: 4
+    resource_class: xlarge
     steps:
       - *attach_workspace
       - *init_environment
@@ -340,13 +341,14 @@ jobs:
         # Run examples tests. The "CIRCLE_NODE_INDEX" will be set if "parallelism" is enabled.
         # Since the parallelism is set to "3", there will be three parallel CircleCI containers
         # with either "0", "1" or "2" as node index. This can be passed to the "--shard" argument.
-      - run: yarn --cwd aio example-e2e --setup --local --shard=${CIRCLE_NODE_INDEX}/${CIRCLE_NODE_TOTAL}
+      - run: yarn --cwd aio example-e2e --setup --local --cliSpecsConcurrency=5 --shard=${CIRCLE_NODE_INDEX}/${CIRCLE_NODE_TOTAL}
 
   test_docs_examples_ivy:
     <<: *job_defaults
     docker:
       # Needed because the example e2e tests depend on Chrome.
       - image: *browsers_docker_image
+    resource_class: xlarge
     # We increase the parallelism here to five while the "test_docs_examples" job runs with
     # a parallelism of four. This is necessary because this job also need to run NGCC which
     # takes up more time and we don't want these jobs to impact the overall CI turnaround.
@@ -365,7 +367,7 @@ jobs:
         # Run examples tests with ivy. The "CIRCLE_NODE_INDEX" will be set if "parallelism" is enabled.
         # Since the parallelism is set to "3", there will be three parallel CircleCI containers
         # with either "0", "1" or "2" as node index. This can be passed to the "--shard" argument.
-      - run: yarn --cwd aio example-e2e --setup --local --ivy --shard=${CIRCLE_NODE_INDEX}/${CIRCLE_NODE_TOTAL}
+      - run: yarn --cwd aio example-e2e --setup --local --ivy --cliSpecsConcurrency=5 --shard=${CIRCLE_NODE_INDEX}/${CIRCLE_NODE_TOTAL}
 
   # This job should only be run on PR builds, where `CI_PULL_REQUEST` is not `false`.
   aio_preview: