Update CI to run all tests

Author: pcj

.github/workflows/ci.yaml

@@ -32,3 +32,10 @@ jobs:
           --bazelrc=.bazelrc
           build
           ...
+      - name: bazel test
+        run: >-
+          bazelisk
+          --bazelrc=.github/workflows/ci.bazelrc
+          --bazelrc=.bazelrc
+          test
+          ...

.github/workflows/release_ruleset.yaml

@@ -44,7 +44,7 @@ on:
       #     Release notes are expected to be outputted to stdout.
       #   type: string
       bazel_test_command:
-        default: "bazel build //..."
+        default: "bazel test //..."
         description: |
           Bazel test command that may be overridden to set custom flags and targets.
           The --disk_cache=~/.cache/bazel-disk-cache --repository_cache=~/.cache/bazel-repository-cache flags are