[ONB] Fix failsafe mode (#2080)

Erasing the nvs before the start of WM prevent WM from starting, revert a part of #2075
Also remove the erase from setupWiFiManager method

Co-authored-by: Florian <1technophile@users.noreply.github.com>

main/ZsensorGPIOInput.ino

@@ -64,6 +64,7 @@ void MeasureGPIOInput() {
         resetTime = millis();
       } else if ((millis() - resetTime) > 3000) {
         Log.trace(F("Button Held" CR));
+        gatewayState = GatewayState::WAITING_ONBOARDING;
 // Switching off the relay during reset or failsafe operations
 #    ifdef ZactuatorONOFF
         uint8_t level = digitalRead(ACTUATOR_ONOFF_GPIO);
@@ -72,7 +73,7 @@ void MeasureGPIOInput() {
         }
 #    endif
         Log.notice(F("Erasing ESP Config, restarting" CR));
-        setupWiFiManager(true);
+        erase(true);
       }
     } else {
       resetTime = 0;