Optimize a flip test case and execute tests upon removing esp_event

test_apps/main/test_relay_chn_core_multi.c

@@ -322,12 +322,10 @@ TEST_CASE("Flipping a running channel stops it and flips direction", "[relay_chn
 
     // 1. Start channel running and verify state
     relay_chn_run_forward(ch);
-    vTaskDelay(pdMS_TO_TICKS(test_delay_margin_ms));
     TEST_ASSERT_EQUAL(RELAY_CHN_STATE_FORWARD, relay_chn_get_state(ch));
 
     // 2. Flip the direction while running
     relay_chn_flip_direction(ch);
-    vTaskDelay(pdMS_TO_TICKS(test_delay_margin_ms)); // Give time for events to process
     
     // 3. The channel should stop as part of the flip process
     TEST_ASSERT_EQUAL(RELAY_CHN_STATE_STOPPED, relay_chn_get_state(ch));