grafana: update grafana dashboard for goaurrpc

* Show totals for the last 24 hours (instead of all time)
* Add total search requests pie chart

Signed-off-by: moson-mo <mo-son@mailbox.org>

roles/grafana/files/dashboards/goaurrpc.json

 {
-  "__inputs": [
-    {
-      "name": "DS_GOAURRPC",
-      "label": "goaurrpc",
-      "description": "",
-      "type": "datasource",
-      "pluginId": "prometheus",
-      "pluginName": "Prometheus"
-    }
-  ],
-  "__elements": {},
-  "__requires": [
-    {
-      "type": "grafana",
-      "id": "grafana",
-      "name": "Grafana",
-      "version": ""
-    },
-    {
-      "type": "panel",
-      "id": "piechart",
-      "name": "Pie chart",
-      "version": ""
-    },
-    {
-      "type": "datasource",
-      "id": "prometheus",
-      "name": "Prometheus",
-      "version": "1.0.0"
-    },
-    {
-      "type": "panel",
-      "id": "stat",
-      "name": "Stat",
-      "version": ""
-    },
-    {
-      "type": "panel",
-      "id": "timeseries",
-      "name": "Time series",
-      "version": ""
-    }
-  ],
   "annotations": {
     "list": [
       {
@@ -124,7 +81,7 @@
             "properties": [
               {
                 "id": "unit",
-                "value": "dateTimeAsIsoNoDateIfToday"
+                "value": "dateTimeFromNow"
               }
             ]
           }
@@ -171,7 +128,7 @@
             "uid": "Prometheus"
           },
           "editorMode": "builder",
-          "expr": "sum(rpc_requests)",
+          "expr": "sum(increase(rpc_requests[24h]))",
           "hide": false,
           "legendFormat": "Requests served",
           "range": true,
@@ -183,7 +140,7 @@
             "uid": "Prometheus"
           },
           "editorMode": "builder",
-          "expr": "sum(rpc_requests_rate_limited)",
+          "expr": "sum(increase(rpc_requests_rate_limited[24h]))",
           "legendFormat": "Requests rate-limited",
           "range": true,
           "refId": "requests_rate_limited"
@@ -194,13 +151,14 @@
             "uid": "Prometheus"
           },
           "editorMode": "builder",
-          "expr": "rpc_cache_hits",
+          "expr": "increase(rpc_cache_hits[24h])",
           "hide": false,
           "legendFormat": "Cache hits",
           "range": true,
           "refId": "A"
         }
       ],
+      "title": "Stats (last 24 hours)",
       "type": "stat"
     },
     {
@@ -208,6 +166,7 @@
         "type": "prometheus",
         "uid": "Prometheus"
       },
+      "description": "The number of requests by \"type\" within the last 24 hours",
       "fieldConfig": {
         "defaults": {
           "color": {
@@ -226,7 +185,7 @@
       },
       "gridPos": {
         "h": 7,
-        "w": 5,
+        "w": 6,
         "x": 6,
         "y": 0
       },
@@ -257,13 +216,81 @@
             "uid": "Prometheus"
           },
           "editorMode": "builder",
-          "expr": "sum by(type) (rpc_requests)",
+          "expr": "sum by(type) (increase(rpc_requests[24h]))",
+          "legendFormat": "__auto",
+          "range": true,
+          "refId": "A"
+        }
+      ],
+      "title": "Total requests (last 24 hours)",
+      "type": "piechart"
+    },
+    {
+      "datasource": {
+        "type": "prometheus",
+        "uid": "Prometheus"
+      },
+      "description": "The number of requests for the search type by \"by\" parameter within the last 24 hours",
+      "fieldConfig": {
+        "defaults": {
+          "color": {
+            "mode": "palette-classic"
+          },
+          "custom": {
+            "hideFrom": {
+              "legend": false,
+              "tooltip": false,
+              "viz": false
+            }
+          },
+          "mappings": []
+        },
+        "overrides": []
+      },
+      "gridPos": {
+        "h": 7,
+        "w": 6,
+        "x": 12,
+        "y": 0
+      },
+      "id": 24,
+      "options": {
+        "displayLabels": [],
+        "legend": {
+          "displayMode": "list",
+          "placement": "bottom",
+          "showLegend": true,
+          "values": []
+        },
+        "pieType": "pie",
+        "reduceOptions": {
+          "calcs": [
+            "lastNotNull"
+          ],
+          "fields": "",
+          "values": false
+        },
+        "tooltip": {
+          "mode": "single",
+          "sort": "none"
+        }
+      },
+      "pluginVersion": "9.2.0",
+      "targets": [
+        {
+          "datasource": {
+            "type": "prometheus",
+            "uid": "Prometheus"
+          },
+          "editorMode": "builder",
+          "expr": "sum by(by) (increase(rpc_requests{type=\"search\"}[24h]))",
+          "hide": false,
           "legendFormat": "__auto",
           "range": true,
           "refId": "A"
         }
       ],
-      "title": "Total Requests by type",
+      "title": "Total search-requests (last 24 hours)",
       "type": "piechart"
     },
     {
@@ -329,8 +356,8 @@
       },
       "gridPos": {
         "h": 7,
-        "w": 13,
-        "x": 11,
+        "w": 6,
+        "x": 18,
         "y": 0
       },
       "id": 6,
@@ -463,7 +490,7 @@
           "refId": "A"
         }
       ],
-      "title": "Requests per second by type",
+      "title": "Requests per second",
       "type": "timeseries"
     },
     {