Envoy is incompatible with --incompatible_load_{cc,java,python}_rules_from_bzl

[Yannic]

Hello maintainers of Envoy 👋,

The Bazel team is in progress of migrating the native C++, Java, and Python rules to Starlark. As a first step towards this goal, starting with Bazel 3.0, all these rules will require explicit load statements.

You can use the following buildifier command to apply most of the required migrations for you:

buildifier --lint=fix --warnings=native-cc,native-java,native-py $(find . -name "BUILD" -o -name "BUILD.bazel" -o -name "*.bzl")

For further information, see bazelbuild/bazel#8743, bazelbuild/bazel#8746, bazelbuild/bazel#9006, or ping me.

Thanks,
Yannic