Flag --incompatible_disable_starlark_host_transitions will break Bazel skylib in Bazel 7.0

Incompatible flag `--incompatible_disable_starlark_host_transitions` will be enabled by default in the next major release (Bazel 7.0), thus breaking Bazel skylib. Please migrate to fix this and unblock the flip of this flag.

The flag is documented here: [bazelbuild/bazel#17032](https://github.com/bazelbuild/bazel/issues/17032).

Please check the following CI builds for build and test results:

- [MacOS OpenJDK 11](https://buildkite.com/bazel/bazelisk-plus-incompatible-flags/builds/1365#0185154a-d91e-453c-9ab1-bfad260fbfe9)
- [Ubuntu 16.04 OpenJDK 8](https://buildkite.com/bazel/bazelisk-plus-incompatible-flags/builds/1365#0185154a-d91b-4d93-aa9d-14d6cd22bbc1)
- [Ubuntu 18.04 OpenJDK 11](https://buildkite.com/bazel/bazelisk-plus-incompatible-flags/builds/1365#0185154a-d918-42d9-a60d-584a838802a4)
- [Windows OpenJDK 11](https://buildkite.com/bazel/bazelisk-plus-incompatible-flags/builds/1365#0185154a-d920-424a-922d-8f50565a1435)
- [MacOS OpenJDK 11](https://buildkite.com/bazel/bazelisk-plus-incompatible-flags/builds/1365#0185154a-d912-42b6-9a2a-0efb1be28568)
- [Ubuntu 16.04 OpenJDK 8](https://buildkite.com/bazel/bazelisk-plus-incompatible-flags/builds/1365#0185154a-d90f-48c1-9713-6bcf51e929a6)
- [Ubuntu 18.04 OpenJDK 11](https://buildkite.com/bazel/bazelisk-plus-incompatible-flags/builds/1365#0185154a-d90b-40d0-b947-15c0a0b7fc5c)
- [Windows OpenJDK 11](https://buildkite.com/bazel/bazelisk-plus-incompatible-flags/builds/1365#0185154a-d915-4924-b5ae-62e67b1d0f7a)

Never heard of incompatible flags before? We have [documentation](https://docs.bazel.build/versions/master/backward-compatibility.html) that explains everything.
If you have any questions, please file an issue in https://github.com/bazelbuild/continuous-integration.

Start with the linked Bazel issue #17032 to understand the incompatible flag and review the referenced Bazelisk-plus-incompatible-flags CI builds. Trace the skylib failures under --incompatible_disable_starlark_host_transitions, then confirm that the migration is complete when the listed macOS, Ubuntu, and Windows builds pass.

Written by the indexing model from the issue text.