Flag --incompatible_disable_starlark_host_transitions will break rules_scala in Bazel 7.0

[mai93]

Flipping this incompatible flag is failing for the Bazel IntelliJ plugin project because of its dependency on rules_scala. The error is:

ERROR: Traceback (most recent call last):
	File "_/external/io_bazel_rules_scala/scala/private/common_attributes.bzl", line 71, column 56, in <toplevel>
		"_code_coverage_instrumentation_worker": attr.label(
Error in label: 'cfg = "host"' is deprecated and should no longer be used. Please use 'cfg = "exec"' instead.
ERROR: Error computing the main repository mapping: at _/external/io_bazel_rules_scala/scala/scala.bzl:34:5: at _/external/io_bazel_rules_scala/scala/private/rules/scala_test.bzl:5:5: initialization of module 'scala/private/common_attributes.bzl' failed

The flag is documented here: bazelbuild/bazel#17032.

More details and references listed here: bazelbuild/intellij#4211

[liucijus]

Thanks, @mai93, for reminding!