Delete setup-minikube action, default ${last_line}, final socat check

Signed-off-by: Michael Edgar <medgar@redhat.com>
Co-authored-by: Thomas Cooper <code@tomcooper.dev>

Author: MikeEdgar

.github/actions/setup-minikube/action.yml

@@ -17,7 +17,7 @@ cleanup_and_exit() {
     fi
 
     if [ "${exit_code}" -ne 0 ]; then
-        echo "❌ Failed with exit code ${exit_code} at line ${last_line}"
+        echo "❌ Failed with exit code ${exit_code} at line ${last_line:-UNKNOWN}"
     fi
 
     kill $(jobs -p) 2>/dev/null || true
@@ -130,6 +130,8 @@ for i in $(seq 1 30); do
     sleep 1
 done
 
+nc -z localhost 5000 || { echo "socat not reachable"; exit 1; }
+
 for img in console-api console-operator console-operator-bundle console-operator-catalog ; do
   # TODO: deeper evaluation of `minikube image load`
   skopeo copy --preserve-digests --dest-tls-verify=false \