feat (uart): change UART events logs to Verbose

UART events like BREAK or errors are now Verbose instead of Warning Level.

Backporting change from Issue #9551

Author: SuGlider

Diff for: cores/esp32/HardwareSerial.cpp

@@ -236,27 +236,27 @@ void HardwareSerial::_uartEventTask(void *args)
                                 uart->_onReceiveCB();
                         break;
                     case UART_FIFO_OVF:
-                        log_w("UART%d FIFO Overflow. Consider adding Hardware Flow Control to your Application.", uart->_uart_nr);
+                        log_v("UART%d FIFO Overflow. Consider adding Hardware Flow Control to your Application.", uart->_uart_nr);
                         currentErr = UART_FIFO_OVF_ERROR;
                         break;
                     case UART_BUFFER_FULL:
-                        log_w("UART%d Buffer Full. Consider increasing your buffer size of your Application.", uart->_uart_nr);
+                        log_v("UART%d Buffer Full. Consider increasing your buffer size of your Application.", uart->_uart_nr);
                         currentErr = UART_BUFFER_FULL_ERROR;
                         break;
                     case UART_BREAK:
-                        log_w("UART%d RX break.", uart->_uart_nr);
+                        log_v("UART%d RX break.", uart->_uart_nr);
                         currentErr = UART_BREAK_ERROR;
                         break;
                     case UART_PARITY_ERR:
-                        log_w("UART%d parity error.", uart->_uart_nr);
+                        log_v("UART%d parity error.", uart->_uart_nr);
                         currentErr = UART_PARITY_ERROR;
                         break;
                     case UART_FRAME_ERR:
-                        log_w("UART%d frame error.", uart->_uart_nr);
+                        log_v("UART%d frame error.", uart->_uart_nr);
                         currentErr = UART_FRAME_ERROR;
                         break;
                     default:
-                        log_w("UART%d unknown event type %d.", uart->_uart_nr, event.type);
+                        log_v("UART%d unknown event type %d.", uart->_uart_nr, event.type);
                         break;
                 }
                 if (currentErr != UART_NO_ERROR) {