Role tweaks (#268)

* Limited boolean values to true/false;

Signed-off-by: Jon S. Stumpf <jon.stumpf@gmail.com>

* Moved ArchLinux prereq task to be a handler;

Signed-off-by: Jon S. Stumpf <jon.stumpf@gmail.com>

* Standardized task name for adding cgroup support;

Signed-off-by: Jon S. Stumpf <jon.stumpf@gmail.com>

* Have backrefs: follow path:;

Signed-off-by: Jon S. Stumpf <jon.stumpf@gmail.com>

* Addressed ansible-lint errors;

Signed-off-by: Jon S. Stumpf <jon.stumpf@gmail.com>

* Fixed #264, task 7: Copy K3s service file;

Signed-off-by: Jon S. Stumpf <jon.stumpf@gmail.com>

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Signed-off-by: Jon S. Stumpf <jon.stumpf@gmail.com>