Bazel 4.0 build breakage

[gdbelvin]

Expected Behavior

bazel build ...
<success>

Actual Behavior

bazel build "..."
ERROR: /private/var/tmp/_bazel_gdb/1ee294688a7b39e0dc652f8edd354879/external/com_google_protobuf/BUILD:1006:21: in proto_lang_toolchain rule @com_google_protobuf//:cc_toolchain: '@com_google_protobuf//:cc_toolchain' does not have mandatory provider 'ProtoInfo'.
ERROR: Analysis of target '//src/backing/client/grpc_client:grpc_client' failed; build aborted: Analysis of target '@com_google_protobuf//:cc_toolchain' failed

Steps to Reproduce the Problem

1. brew install bazel
2. git clone https://github.com/googleinterns/cloud-kms-oss-tools.git
3. cd cloud-kms-oss-tools
4. bazel build "..."

Specifications

• Checkout: 36821d0
• Bazel: bazel --version
  bazel 4.0.0-homebrew
• Platform: sw_vers
  ProductName: Mac OS X
  ProductVersion: 10.15.7

This seems related to bazelbuild/bazel#12887