Increase VectorSetOverwriteTests timeout (#2055)

* in local testing failures do not reproduce, suggests the CI machine is at fault; kick up timeouts during Vector Set overwrite tests to test that hypothesis

* actually use the higher timeout, yeesh

Author: kevin-montrose

test/standalone/Garnet.test.vectorset/VectorSetOverwriteTests.cs

@@ -237,7 +237,9 @@ private async Task TestVectorSetOverwrittenCommandAsync(
 
             var vectorManager = server.Provider.StoreWrapper.DefaultDatabase.VectorManager;
 
-            using var redis = ConnectionMultiplexer.Connect(TestUtils.GetConfig(allowAdmin: true));
+            var config = TestUtils.GetConfig(allowAdmin: true);
+            config.AsyncTimeout = (int)TimeSpan.FromMinutes(3).TotalMilliseconds;
+            using var redis = ConnectionMultiplexer.Connect(config);
             var s = redis.GetServers().Single();
             var db = redis.GetDatabase();