ROX-29909: Configure and document Dev ROSA classic cluster provisioning (#2610)

Author: kovayur

dev/env/defaults/02-infra.env

@@ -12,7 +12,7 @@ is_infra_cluster() {
             echo "Can't auto-detect if the selected cluster is an infra cluster because the infractl tool is not installed."
             return 1
         fi
-        if infractl list --json | jq -r '.Clusters[].URL' | grep -q $(oc whoami --show-console); then
+        if infractl list --json | jq -r '.Clusters[].URL' 2>/dev/null | grep -q $(oc whoami --show-console); then
             return 0
         fi
     fi