JENKINS-1877 Add ability to specify shut down reason (#4274)

Co-authored-by: Oleg Nenashev <o.v.nenashev@gmail.com>
Co-authored-by: Daniel Beck <1831569+daniel-beck@users.noreply.github.com>
Co-authored-by: Tim Jacomb <t.jacomb@kainos.com>
Co-authored-by: Ilya Zasimov <austry@yandex-team.ru>