Flag --incompatible_disable_starlark_host_transitions will break Bazel skylib in Bazel 7.0

[keertk]

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.

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

• MacOS OpenJDK 11
• Ubuntu 16.04 OpenJDK 8
• Ubuntu 18.04 OpenJDK 11
• Windows OpenJDK 11
• MacOS OpenJDK 11
• Ubuntu 16.04 OpenJDK 8
• Ubuntu 18.04 OpenJDK 11
• Windows OpenJDK 11

Never heard of incompatible flags before? We have documentation that explains everything.
If you have any questions, please file an issue in https://github.com/bazelbuild/continuous-integration.

[tetromino]

bazel-skylib does not use cfg = "host"; the error comes from the gazelle plugin's dependency on rules_go.

We'd need to update our rules_go dep to 0.38.0 or newer.

[tetromino]

... and we'd also need for rules_pkg to update its rules_license dep to be compatible with --incompatible_disable_starlark_host_transitions. But fortunately that's build dep only - it won't affect users of bazel-skylib releases.