nano_33_ble - Default the Power pin to on

This matches the sate of the LED if you run it on MBED.

Note: wondering if the led defines in some of the dtsi files should be renamed from user to PWR to match
what is shown in the pinout for these boards.  But maybe used elsewhere for USER, like maybe maybe python?

Author: KurtE

boards/arduino/nano_33_ble/board.c

@@ -29,7 +29,7 @@ static int board_init(void)
 		return res;
 	}
 
-	return gpio_pin_configure_dt(&user_led, GPIO_OUTPUT_INACTIVE);
+	return gpio_pin_configure_dt(&user_led, GPIO_OUTPUT_HIGH);
 }
 
 SYS_INIT(board_init, POST_KERNEL, CONFIG_KERNEL_INIT_PRIORITY_DEVICE);