Add vars/argocd_init.groovy

vars/argocd_init.groovy

@@ -0,0 +1,6 @@
+def call(String argocdServer, String argocdUser, String argocdPass) {
+    container('argocd') {
+        sh "argocd login ${argocdServer} --username ${argocdUser} --password ${argocdPass}"
+        echo "Logged in to ArgoCD"
+    }
+}