ci: replace RBE instance name for components-repo-unit-tests job

Temporarily replaces the RBE instance name for the
`components-repo-unit-tests` job until
angular/components#23056 is available.

Author: devversion

.circleci/config.yml

@@ -734,6 +734,10 @@ jobs:
             # variable. It needs to be hardcoded here, because env variables interpolation is
             # not supported.
             - '/tmp/angular-components-repo'
+      - run:
+          # TODO(devversion): remove once https://github.com/angular/components/pull/23056 is available.
+          name: Replace RBE container instance name
+          command: sed -i "s#default_instance#primary_instance#g" ${COMPONENTS_REPO_TMP_DIR}/.bazelrc
       - run:
           # Updates the `angular/components` `package.json` file to refer to the release output
           # inside the `packages-dist` directory.