fix(tests): update snuba route on test (#39025)

fixes broken acceptance test after merge of
getsentry/snuba#3157

Author: JoshFerge

src/sentry/testutils/cases.py

@@ -1382,7 +1382,9 @@ def store_replays(self, replays):
         assert (
             len(replays) >= 2
         ), "You need to store at least 2 replay events for the replay to be considered valid"
-        response = requests.post(settings.SENTRY_SNUBA + "/tests/replays/insert", json=replays)
+        response = requests.post(
+            settings.SENTRY_SNUBA + "/tests/entities/replays/insert", json=replays
+        )
         assert response.status_code == 200
 
     def store_replay_segments(