chore: add flag to skip intermittenly failing e2e test

This has been failing intermittently for awhile with the latest being
https://github.com/logseq/logseq/actions/runs/19863440926/job/56919481889

clj-e2e/bb.edn

@@ -13,7 +13,7 @@
   prn {:task (clojure "-X clojure.core/prn" cli-opts)}
 
   test {:doc "run tests (ns'es ending in '-basic-test')"
-        :task (do (clojure "-M:test -r \".*\\-basic\\-test$\"")
+        :task (do (clojure "-M:test -r \".*\\-basic\\-test$\" -e fix-me")
                   (System/exit 0))}
 
   rtc-extra-test {:doc "run rtc-extra-test"

clj-e2e/test/logseq/e2e/rtc_basic_test.clj

@@ -16,7 +16,7 @@
 
 (use-fixtures :each fixtures/validate-graph)
 
-(deftest rtc-basic-test
+(deftest ^:fix-me rtc-basic-test
   (let [graph-name (str "rtc-graph-" (.toEpochMilli (java.time.Instant/now)))
         page-names (map #(str "rtc-test-page" %) (range 4))]
     (testing "open 2 app instances, add a rtc graph, check this graph available on other instance"