[flaky] Increase timeout (#30909)

test/core/tsi/alts/handshaker/alts_concurrent_connectivity_test.cc

@@ -225,8 +225,6 @@ class ConnectLoopRunner {
           self->server_address_.get(), self->fake_handshake_server_addr_.get(),
           self->reconnect_backoff_ms_);
       // Connect, forcing an ALTS handshake
-      gpr_timespec connect_deadline =
-          grpc_timeout_seconds_to_deadline(self->per_connect_deadline_seconds_);
       grpc_connectivity_state state =
           grpc_channel_check_connectivity_state(channel, 1);
       ASSERT_EQ(state, GRPC_CHANNEL_IDLE);
@@ -240,7 +238,10 @@ class ConnectLoopRunner {
         grpc_channel_watch_connectivity_state(
             channel, state, gpr_inf_future(GPR_CLOCK_REALTIME), cq, nullptr);
         grpc_event ev =
-            grpc_completion_queue_next(cq, connect_deadline, nullptr);
+            grpc_completion_queue_next(cq,
+                                       grpc_timeout_seconds_to_deadline(
+                                           self->per_connect_deadline_seconds_),
+                                       nullptr);
         ASSERT_EQ(ev.type, GRPC_OP_COMPLETE)
             << "connect_loop runner:" << std::hex << self
             << " got ev.type:" << ev.type << " i:" << i;
@@ -289,7 +290,7 @@ TEST(AltsConcurrentConnectivityTest, TestBasicClientServerHandshakes) {
   {
     ConnectLoopRunner runner(
         test_server.address(), fake_handshake_server.address(),
-        5 /* per connect deadline seconds */, 10 /* loops */,
+        10 /* per connect deadline seconds */, 10 /* loops */,
         GRPC_CHANNEL_READY /* expected connectivity states */,
         0 /* reconnect_backoff_ms unset */);
   }