[Bazel CI] Downstream failure: //:container_test fails with Exit 1 in bazelbuild/examples

CI: https://buildkite.com/bazel/bazel-at-head-plus-downstream/builds/5723#01a05603-d27d-4978-8761-665e43ba03ba

Platform: Ubuntu

Logs:

```
(04:11:59) FAIL: //:container_test (Exit 1) (see /var/lib/buildkite-agent/.cache/bazel/_bazel_buildkite-agent/68190a0d57919f3ff18adb4a5e73fea4/execroot/_main/bazel-out/k8-fastbuild/testlogs/container_test/test_attempts/attempt_1.log)
--
  | (04:11:59) FAIL: //:container_test (Exit 1) (see /var/lib/buildkite-agent/.cache/bazel/_bazel_buildkite-agent/68190a0d57919f3ff18adb4a5e73fea4/execroot/_main/bazel-out/k8-fastbuild/testlogs/container_test/test_attempts/attempt_2.log)
  | (04:11:59) [2 / 3] 1 / 2 tests; 1 action; last test: //:tests
  | Testing //:container_test; 0s remote-cache, linux-sandbox
  | buildkite-agent artifact upload --content-type text/plain;charset=utf-8 container_test/test_attempts/attempt_1.log
  | 2026-08-31 04:12:00 INFO Found 1 files that match "container_test/test_attempts/attempt_1.log"
  | 2026-08-31 04:12:00 INFO Uploading to Google Cloud Storage ("gs://bazel-untrusted-buildkite-artifacts/01a05603-d27d-4978-8761-665e43ba03ba"), using your agent configuration
  | (04:12:00) FAIL: //:container_test (Exit 1) (see /var/lib/buildkite-agent/.cache/bazel/_bazel_buildkite-agent/68190a0d57919f3ff18adb4a5e73fea4/execroot/_main/bazel-out/k8-fastbuild/testlogs/container_test/test.log)
  |  
  | FAILED: //:container_test (Summary)
  | /var/lib/buildkite-agent/.cache/bazel/_bazel_buildkite-agent/68190a0d57919f3ff18adb4a5e73fea4/execroot/_main/bazel-out/k8-fastbuild/testlogs/container_test/test.log
  | /var/lib/buildkite-agent/.cache/bazel/_bazel_buildkite-agent/68190a0d57919f3ff18adb4a5e73fea4/execroot/_main/bazel-out/k8-fastbuild/testlogs/container_test/test_attempts/attempt_1.log
  | /var/lib/buildkite-agent/.cache/bazel/_bazel_buildkite-agent/68190a0d57919f3ff18adb4a5e73fea4/execroot/_main/bazel-out/k8-fastbuild/testlogs/container_test/test_attempts/attempt_2.log
  | (04:12:00) INFO: Found 2 test targets...
  | (04:12:00) INFO: Elapsed time: 1.472s, Critical Path: 1.28s
  | (04:12:00) INFO: 3 processes: 1 remote cache hit, 1 internal, 6 linux-sandbox.
  | (04:12:00) INFO: Build completed, 1 test FAILED, 3 total actions
  | //:tests PASSED in 0.2s
  | //:container_test FAILED in 3 out of 3 in 0.1s
  | Stats over 3 runs: max = 0.1s, min = 0.1s, avg = 0.1s, dev = 0.0s
  | /var/lib/buildkite-agent/.cache/bazel/_bazel_buildkite-agent/68190a0d57919f3ff18adb4a5e73fea4/execroot/_main/bazel-out/k8-fastbuild/testlogs/container_test/test.log
  | /var/lib/buildkite-agent/.cache/bazel/_bazel_buildkite-agent/68190a0d57919f3ff18adb4a5e73fea4/execroot/_main/bazel-out/k8-fastbuild/testlogs/container_test/test_attempts/attempt_1.log
  | /var/lib/buildkite-agent/.cache/bazel/_bazel_buildkite-agent/68190a0d57919f3ff18adb4a5e73fea4/execroot/_main/bazel-out/k8-fastbuild/testlogs/container_test/test_attempts/attempt_2.log
  |  
  | Executed 2 out of 2 tests: 1 test passes and 1 fails locally.
```

Steps:

git clone -v https://github.com/bazelbuild/examples.git
git reset 115fd19cff4c788ad846fa65811902b17b23bf69 --hard
export USE_BAZEL_VERSION=bf49a0edc2c5aa879511846ef5285f709cd27e76
bazel build //...

CC Greenteam @Wyverald