Enables remote cache key scrubbing with the supplied configuration file, which must be a protocol buffer in text format (see src/main/protobuf/remote_scrubbing.proto).This feature is intended to facilitate sharing a remote/disk cache between actions executing on different platforms but targeting the same platform. It should be used with extreme care, as improper settings may cause accidental sharing of cache entries and result in incorrect builds.Scrubbing does not affect how an action is executed, only how its remote/disk cache key is computed for the purpose of retrieving or storing an action result. Scrubbed actions are incompatible with remote execution, and will always be executed locally instead.Modifying the scrubbing configuration does not invalidate outputs present in the local filesystem or internal caches; a clean build is required to reexecute affected actions.In order to successfully use this feature, you likely want to set a custom --host_platform together with --experimental_platform_in_output_dir (to normalize output prefixes) and --incompatible_strict_action_env (to normalize environment variables).