[v2] CLI site create command on nonkube platforms should not require the bindHost flag

[fgiorgetti]

Describe the bug
When using the CLI to create a site for nonkube platforms, the --bind-host field is
considered as required. This should only be true, when --enable-link-access is set to true.

If --enable-link-access is not passed or forcibly set to false, a RouterAccess should not be
created as well.

How To Reproduce
skupper --platform podman site create my-site

Expected behavior
Create a site resource. But it fails requiring the --bind-host flag.

Environment details

• Skupper CLI: v2
• Platform: non-kube