CI started failing with `//examples:simple_test_bazel_last_green` on 2025-05-31

[Example failure](https://github.com/bazel-contrib/rules_bazel_integration_test/actions/runs/15363188582/job/43236206206)

```
ERROR: /private/var/tmp/_bazel_runner/337312d013df18b21514d2dfe8bd89a5/execroot/_main/bazel-out/darwin_arm64-fastbuild/bin/examples/simple_test_bazel_last_green.runfiles/_main/examples/simple/mockascript/BUILD.bazel:17:14: While resolving toolchains for target //mockascript:bzlformat_lint_test (467699e): invalid registered toolchain '@zstd_toolchains//:all': while parsing '@zstd_toolchains//:all': error loading package '@@aspect_bazel_lib++toolchains+zstd_toolchains//': Unable to find package for @@[unknown repo 'local_config_platform' requested from @@aspect_bazel_lib++toolchains+zstd_toolchains]//:constraints.bzl: The repository '@@[unknown repo 'local_config_platform' requested from @@aspect_bazel_lib++toolchains+zstd_toolchains]' could not be resolved: No repository visible as '@local_config_platform' from repository '@@aspect_bazel_lib++toolchains+zstd_toolchains'.
```