Initialize skupper podman with Custom Certificates.

[jasondickerson]

Is your feature request related to a problem? Please describe. I would like to be able to use a custom Trusted CA issued certificate when performing:

skupper --platform podman init --ingress my_host

This would allow me to use a custom certificate which is trusted by my organization and user base, managed by my pki infrastructure, and would allow me to initialize multiple skupper hosts with the same Certificate and ingress name; thus allowing me to loadbalance skupper connections over multiple ingress hosts. This would allow me to scale up my skupper podman ingress infrastructure without reconfiguring skupper podman clients.

Describe the solution you'd like Add parameters to the skupper --platform podman init command to specify the following files to use: ca.crt, tls.crt, and tls.key.