invoke k3s via full path

[kingphil]

[kingphil]

Running k3s via full path is a common request.

https://github.com/k3s-io/k3s-ansible/issues/184#issue-1197007580 https://github.com/k3s-io/k3s-ansible/issues/100#issuecomment-919724802

I need this for AlmaLinux 8 support, which defines secure_path in /etc/sudoers: Defaults secure_path = /sbin:/bin:/usr/sbin:/usr/bin

[dereknola]

Closing as duplicate of https://github.com/k3s-io/k3s-ansible/pull/143