Add minimum version info for External Policies (#10589)
Add minimum version info for External Policies (#10589)

* Version information added. 

Added kops version information for external policies support.

* Apply suggestions from code review

Co-authored-by: Ciprian Hacman <3c54f3780f021ef5cf5c130eb592a233215ca6e1@gmail.com>
kubernetes/kops,justinsb/kops,justinsb/kops,kubernetes/kops,kubernetes/kops,justinsb/kops