forked from rook/rook
running make shellcheck required shellcheck to be installed locally in the $PATH. This change renders make shellcheck self-contained by installing shellcheck in the local tools cache directory likeit is already done with other tools. Signed-off-by: Michael Adam <obnox@samba.org> Co-authored-by: Copilot <175728472+Copilot@users.noreply.github.com>