updates OWNERS files for third_party dependencies
usage: fx update-3p-owners [--rust-metadata FILE] [--integration-manifest FILE] [--path PROJECT_PATH] [--skip-rustc-3p-update] [--skip-existing] [--dry-run] Updates OWNERS files for projects, based on gn target references. For any given project, the tool adds as owners the owners of the projects that depend on that project. Arguments: --rust-metadata FILE: update OWNERS for the projects specified in the rust metadata JSON FILE. --integration-manifest FILE: update OWNERS for the projects specified in the integration manifest XML FILE. --skip-existing: only generate OWNERS files for projects missing owners; does not update existing OWNERS files. --path PROJECT_PATH: update OWNERS for the projects in the specified path; accepts wildcard. --skip-rustc-3p-update: skip updating rustc_library and rustc_binary third_party dependencies. --dry-run: print the generated content without creating OWNERS files. See https://fuchsia.dev/fuchsia-src/development/languages/rust/third_party.md for more details.