@grafana/e2e: fixes (#24960)

* Resolve Cypress bin path

... instead of expecting it to be in a place that it may not be, depending on de-duping/flattening of nested dependencies

* Remove dashboard before removing datasource

... it makes more sense and it fixes random issues, perhaps something to do with how the backend is implemented.

* Updated lockfile

packages/grafana-e2e/src/support/scenario.ts

@@ -35,13 +35,13 @@ export const e2eScenario = ({
 
       afterEach(() => {
         getScenarioContext().then(({ lastAddedDashboardUid, lastAddedDataSource }: any) => {
-          if (lastAddedDataSource) {
-            Flows.deleteDataSource(lastAddedDataSource);
-          }
-
           if (lastAddedDashboardUid) {
             Flows.deleteDashboard(lastAddedDashboardUid);
           }
+
+          if (lastAddedDataSource) {
+            Flows.deleteDataSource(lastAddedDataSource);
+          }
         });
       });