ETCD-493: Reflect etcd grafana dashboard mixin from upstream

jsonnet/dashboard.jsonnet

@@ -1,4 +1,9 @@
-local etcdMixin = (import 'github.com/etcd-io/etcd/contrib/mixin/mixin.libsonnet');
+local etcdMixin = (import 'github.com/etcd-io/etcd/contrib/mixin/mixin.libsonnet')
+{
+  _config+: {
+    grafana7x: true,
+  },
+};
 
 {
   apiVersion: 'v1',

jsonnet/jsonnetfile.json

@@ -9,6 +9,15 @@
         }
       },
       "version": "main"
+    },
+    {
+      "source": {
+        "git": {
+          "remote": "https://github.com/grafana/grafonnet.git",
+          "subdir": "gen/grafonnet-v10.0.0"
+        }
+      },
+      "version": "main"
     }
   ],
   "legacyImports": true

jsonnet/jsonnetfile.lock.json

@@ -8,8 +8,38 @@
           "subdir": "contrib/mixin"
         }
       },
-      "version": "d3233fec0ab260b957198d9f636497f9f3e7cec4",
-      "sum": "GdePvMDfLQcVhwzk/Ephi/jC27ywGObLB5t0eC0lXd4="
+      "version": "d6c0127d264d18255090b4a51e04c5b8e84d5a05",
+      "sum": "IXI3LQIT9NmTPJAk8WLUJd5+qZfcGpeNCyWIK7oEpws="
+    },
+    {
+      "source": {
+        "git": {
+          "remote": "https://github.com/grafana/grafonnet.git",
+          "subdir": "gen/grafonnet-v10.0.0"
+        }
+      },
+      "version": "5a66b0f6a0f4f7caec754dd39a0e263b56a0f90a",
+      "sum": "xdcrJPJlpkq4+5LpGwN4tPAuheNNLXZjE6tDcyvFjr0="
+    },
+    {
+      "source": {
+        "git": {
+          "remote": "https://github.com/jsonnet-libs/docsonnet.git",
+          "subdir": "doc-util"
+        }
+      },
+      "version": "6ac6c69685b8c29c54515448eaca583da2d88150",
+      "sum": "BrAL/k23jq+xy9oA7TWIhUx07dsA/QLm3g7ktCwe//U="
+    },
+    {
+      "source": {
+        "git": {
+          "remote": "https://github.com/jsonnet-libs/xtd.git",
+          "subdir": ""
+        }
+      },
+      "version": "63d430b69a95741061c2f7fc9d84b1a778511d9c",
+      "sum": "qiZi3axUSXCVzKUF83zSAxklwrnitMmrDK4XAfjPMdE="
     }
   ],
   "legacyImports": false

jsonnet/vendor/doc-util

@@ -0,0 +1 @@
+github.com/jsonnet-libs/docsonnet/doc-util