/usr/share/ is in ruby-grpc-tools 1.3.2+debian-4build1.
This file is owned by root:root, with mode 0o755.
..
/usr/share/doc/
/usr/share/doc/ruby-grpc-tools/
/usr/share/doc/ruby-grpc-tools/copyright
/usr/share/rubygems-integration/
/usr/share/rubygems-integration/all/
/usr/share/rubygems-integration/all/gems/
/usr/share/rubygems-integration/all/gems/grpc-tools-1.3.2/
/usr/share/rubygems-integration/all/gems/grpc-tools-1.3.2/bin/
/usr/share/rubygems-integration/all/gems/grpc-tools-1.3.2/bin/grpc_tools_ruby_protoc
/usr/share/rubygems-integration/all/gems/grpc-tools-1.3.2/bin/grpc_tools_ruby_protoc_plugin
/usr/share/rubygems-integration/all/gems/grpc-tools-1.3.2/platform_check.rb
/usr/share/rubygems-integration/all/gems/grpc-tools-1.3.2/version.rb
/usr/share/rubygems-integration/all/specifications/
/usr/share/rubygems-integration/all/specifications/grpc-tools-1.3.2.gemspec
/usr/share/doc/ruby-grpc-tools/changelog.Debian.gz