Krikri::AptDebInstall

The deb: install machinery of the apt module, shared by the package module's apt backend (whose deb: tasks previously fell through to the empty-name path and silently reported ok without installing anything - rchouinard.mysql-community-repo round 5210000: real installed the mysql-apt-config deb (changed=1), krikri reported ok and the .deb never landed). Extracted verbatim from apt.cr so the two plugins can't drift; requires the including plugin to provide BasePlugin's remote_exec/params/check_mode surface.