Stabilize Nightly K8s Matrix E2E cleanup by making IPPool deletion idempotent (#5636)

* Initial plan

* test(e2e): ignore notfound when deleting ippool by name

Agent-Logs-Url: https://github.com/spidernet-io/spiderpool/sessions/f9f1436f-70c0-4d93-8f46-ad7753b01d71

Co-authored-by: cyclinder <59680092+cyclinder@users.noreply.github.com>

* chore: finalize nightly k8s matrix ci fix status

Agent-Logs-Url: https://github.com/spidernet-io/spiderpool/sessions/f9f1436f-70c0-4d93-8f46-ad7753b01d71

Co-authored-by: cyclinder <59680092+cyclinder@users.noreply.github.com>

* chore: remove accidental local build artifacts

Agent-Logs-Url: https://github.com/spidernet-io/spiderpool/sessions/f9f1436f-70c0-4d93-8f46-ad7753b01d71

Co-authored-by: cyclinder <59680092+cyclinder@users.noreply.github.com>

---------

Co-authored-by: copilot-swe-agent[bot] <198982749+Copilot@users.noreply.github.com>
Co-authored-by: cyclinder <59680092+cyclinder@users.noreply.github.com>

Author: Copilot

cmd/coordinator/coordinator

@@ -140,7 +140,11 @@ func DeleteIPPoolByName(f *frame.Framework, poolName string, opts ...client.Dele
 			Name: poolName,
 		},
 	}
-	return f.DeleteResource(pool, opts...)
+	err := f.DeleteResource(pool, opts...)
+	if err != nil && api_errors.IsNotFound(err) {
+		return nil
+	}
+	return err
 }
 
 func GetIppoolByName(f *frame.Framework, poolName string) (*v1.SpiderIPPool, error) {