[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/api-hal/api-hal-power.c

@@ -66,6 +66,7 @@ void HAL_RCC_CSSCallback(void) {
 }
 
 void api_hal_power_init() {
+    LL_PWR_SetRegulVoltageScaling(LL_PWR_REGU_VOLTAGE_SCALE1);
     LL_PWR_SMPS_SetMode(LL_PWR_SMPS_STEP_DOWN);
     bq27220_init(&cedv);
     bq25896_init();