chore: add lines to provisioning metrics (#912)

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## Changes

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infra/tf/grafana/grafana_dashboards/cluster-provisioning.json

@@ -999,7 +999,7 @@
               "mode": "none"
             },
             "thresholdsStyle": {
-              "mode": "off"
+              "mode": "dashed"
             }
           },
           "mappings": [],
@@ -1013,7 +1013,7 @@
               },
               {
                 "color": "red",
-                "value": 80
+                "value": 100
               }
             ]
           },
@@ -1097,7 +1097,7 @@
               "mode": "none"
             },
             "thresholdsStyle": {
-              "mode": "off"
+              "mode": "dashed"
             }
           },
           "mappings": [],
@@ -1111,7 +1111,7 @@
               },
               {
                 "color": "red",
-                "value": 80
+                "value": 100
               }
             ]
           },
@@ -1195,7 +1195,7 @@
               "mode": "none"
             },
             "thresholdsStyle": {
-              "mode": "off"
+              "mode": "dashed"
             }
           },
           "mappings": [],
@@ -1209,7 +1209,7 @@
               },
               {
                 "color": "red",
-                "value": 80
+                "value": 100
               }
             ]
           },
@@ -1299,7 +1299,7 @@
               "mode": "none"
             },
             "thresholdsStyle": {
-              "mode": "off"
+              "mode": "dashed"
             }
           },
           "mappings": [],
@@ -1313,7 +1313,7 @@
               },
               {
                 "color": "red",
-                "value": 80
+                "value": 100
               }
             ]
           },
@@ -1403,7 +1403,7 @@
               "mode": "none"
             },
             "thresholdsStyle": {
-              "mode": "off"
+              "mode": "dashed"
             }
           },
           "mappings": [],
@@ -1417,7 +1417,7 @@
               },
               {
                 "color": "red",
-                "value": 80
+                "value": 100
               }
             ]
           },
@@ -1507,7 +1507,7 @@
               "mode": "none"
             },
             "thresholdsStyle": {
-              "mode": "off"
+              "mode": "dashed"
             }
           },
           "mappings": [],
@@ -1521,7 +1521,7 @@
               },
               {
                 "color": "red",
-                "value": 80
+                "value": 100
               }
             ]
           },
@@ -1572,7 +1572,7 @@
       "type": "timeseries"
     }
   ],
-  "refresh": "5s",
+  "refresh": "30s",
   "schemaVersion": 39,
   "tags": [
     "rivet"