Remove --build_tests_only from the bazel test command in CI.

* this will check the build rules more strictly.

#codehealth

PiperOrigin-RevId: 719145071

.github/workflows/linux.yaml

@@ -65,4 +65,4 @@ jobs:
       - name: bazel test
         working-directory: ./src
         run: |
-          bazelisk test ... --config oss_linux --build_tests_only -c dbg
+          bazelisk test ... --config oss_linux -c dbg