Alerting: Update mute timings provisioning API to support optimistic locking (#88731)

* add version to time-interval models
* set time interval fingerprint as version
* update to check provided version
* delete to check if version is provided in query parameter 'version'
* update integration tests
* update specs

pkg/services/ngalert/api/tooling/spec.json

@@ -3060,6 +3060,12 @@
             "schema": {
               "$ref": "#/definitions/ValidationError"
             }
+          },
+          "409": {
+            "description": "GenericPublicError",
+            "schema": {
+              "$ref": "#/definitions/GenericPublicError"
+            }
           }
         }
       },
@@ -3077,6 +3083,17 @@
             "name": "name",
             "in": "path",
             "required": true
+          },
+          {
+            "type": "string",
+            "description": "Version of mute timing to use for optimistic concurrency. Leave empty to disable validation",
+            "name": "version",
+            "in": "query"
+          },
+          {
+            "type": "string",
+            "name": "X-Disable-Provenance",
+            "in": "header"
           }
         ],
         "responses": {
@@ -6316,6 +6333,9 @@
           "items": {
             "$ref": "#/definitions/TimeIntervalItem"
           }
+        },
+        "version": {
+          "type": "string"
         }
       }
     },