chore(ci): test on bazel 9 (#853)

Author: alexeagle

.bcr/presubmit.yml

@@ -2,7 +2,7 @@ bcr_test_module:
     module_path: 'e2e/smoke'
     matrix:
         # TODO: e2e/smoke broken with bazel6
-        bazel: ['8.x', '7.x']
+        bazel: ['rolling', '8.x', '7.x']
         platform: ['debian10', 'macos', 'ubuntu2004', 'windows']
     tasks:
         run_tests: