[FL-1558] Technical Debt: console, bootloader, targets, stdglue, etc... (#590)

* ApiHal: console abstraction, change uart baud rate to 230400. Bootloader: drop F5. Furi: prevent thread local output to serial console in stdglue.
* ApiHal: take control over system initialization, reorder some subsystems in a hope of fixing USB issues.
* Main: cleanup dead code. ISR: take care of HSECSS by our self. USB: leave clock configuration alone.
* F6 cube: switch RCC to LL.
* Cli: rollback return behavior.

firmware/targets/f6/Src/usbd_conf.c

@@ -60,7 +60,6 @@ static USBD_StatusTypeDef USBD_Get_USB_Status(HAL_StatusTypeDef hal_status);
 static void SystemClockConfig_Resume(void);
 
 /* USER CODE END 1 */
-extern void SystemClock_Config(void);
 
 /*******************************************************************************
                        LL Driver Callbacks (PCD -> USB Device Library)
@@ -774,7 +773,6 @@ void USBD_static_free(void *p)
   */
 static void SystemClockConfig_Resume(void)
 {
-  SystemClock_Config();
 }
 /* USER CODE END 5 */