build: do not hide output of bazel yarn install (#18765)

By default, the `yarn_install` output is hidden. We should enable
it so that we can see progress, or potential postinstall errors.

WORKSPACE

@@ -49,13 +49,18 @@ node_repositories(
 
 yarn_install(
     name = "npm",
+    # Redirects Yarn `stdout` output to `stderr`. This ensures that stdout is not accidentally
+    # polluted when Bazel runs Yarn. Workaround until the upstream fix is available:
+    # https://github.com/bazelbuild/bazel/pull/10611.
+    args = ["1>&2"],
     # We add the postinstall patches file, and ngcc main fields update script here so
     # that Yarn will rerun whenever one of these files has been modified.
     data = [
         "//:tools/postinstall/apply-patches.js",
         "//:tools/postinstall/update-ngcc-main-fields.js",
     ],
     package_json = "//:package.json",
+    quiet = False,
     yarn_lock = "//:yarn.lock",
 )