Hide auth subcommand family from help output

[brynary]

These are not yet ready for prime time. h/t @robbyrussell

[qltysh]

The code coverage on the diff in this pull request is 100.0%

Drilldown

Path	File Coverage Δ
qlty-check/src/tool/command_builder.rs	-2.6
qlty-config/src/library.rs	0.7
qlty-cli/src/initializer/scanner/gemfile.rs	0.3
qlty-check/src/tool/ruby/sys/macos.rs	-3.1
qlty-check/src/tool/download.rs	-0.7
qlty-check/src/tool/ruby/sys/linux.rs	1.6