feat: Introducing reth_engine_rpc_new_payload_v4 to grafana (paradigmxyz#15794)

Author: Ayushdubey86

etc/grafana/dashboards/overview.json

@@ -5973,7 +5973,87 @@
           "range": true,
           "refId": "O",
           "useBackend": false
-        }
+        },
+        {
+          "datasource": {
+            "type": "prometheus",
+            "uid": "${datasource}"
+          },
+          "disableTextWrap": false,
+          "editorMode": "builder",
+          "expr": "reth_engine_rpc_new_payload_v4{instance=~\"$instance\", quantile=\"0\"}",
+          "fullMetaSearch": false,
+          "hide": false,
+          "includeNullMetadata": true,
+          "legendFormat": "engine_newPayloadV4 min",
+          "range": true,
+          "refId": "P",
+          "useBackend": false
+        },
+        {
+          "datasource": {
+            "type": "prometheus",
+            "uid": "${datasource}"
+          },
+          "disableTextWrap": false,
+          "editorMode": "builder",
+          "expr": "reth_engine_rpc_new_payload_v4{instance=~\"$instance\", quantile=\"0.5\"}",
+          "fullMetaSearch": false,
+          "hide": false,
+          "includeNullMetadata": true,
+          "legendFormat": "engine_newPayloadV4 p50",
+          "range": true,
+          "refId": "Q",
+          "useBackend": false
+        },
+        {
+          "datasource": {
+            "type": "prometheus",
+            "uid": "${datasource}"
+          },
+          "disableTextWrap": false,
+          "editorMode": "builder",
+          "expr": "reth_engine_rpc_new_payload_v4{instance=~\"$instance\", quantile=\"0.9\"}",
+          "fullMetaSearch": false,
+          "hide": false,
+          "includeNullMetadata": true,
+          "legendFormat": "engine_newPayloadV4 p90",
+          "range": true,
+          "refId": "R",
+          "useBackend": false
+        },
+        {
+          "datasource": {
+            "type": "prometheus",
+            "uid": "${datasource}"
+          },
+          "disableTextWrap": false,
+          "editorMode": "builder",
+          "expr": "reth_engine_rpc_new_payload_v4{instance=~\"$instance\", quantile=\"0.95\"}",
+          "fullMetaSearch": false,
+          "hide": false,
+          "includeNullMetadata": true,
+          "legendFormat": "engine_newPayloadV4 p95",
+          "range": true,
+          "refId": "S",
+          "useBackend": false
+        },
+        {
+          "datasource": {
+            "type": "prometheus",
+            "uid": "${datasource}"
+          },
+          "disableTextWrap": false,
+          "editorMode": "builder",
+          "expr": "reth_engine_rpc_new_payload_v4{instance=~\"$instance\", quantile=\"0.99\"}",
+          "fullMetaSearch": false,
+          "hide": false,
+          "includeNullMetadata": true,
+          "legendFormat": "engine_newPayloadV4 p99",
+          "range": true,
+          "refId": "T",
+          "useBackend": false
+        }        
       ],
       "title": "Engine API newPayload Latency",
       "type": "timeseries"