Let Tasmota compile with USE_BERRY but without USE_WEBCLIENT

[GMagician]

Despite comments say you can disable USE_WEBCLIENT when you habe USE_BERRY, if you do that you get a compile error because 'StreamBeBytesWriter' is not defined.

Checklist:

• The pull request is done against the latest development branch
• Only relevant files were touched
• Only one feature/fix was added per PR and the code change compiles without warnings
• The code change is tested and works with Tasmota core ESP8266 V.2.7.8
• The code change is tested and works with Tasmota core ESP32 V.3.1.3.250302
• I accept the CLA.

[s-hadinger]

Sorry but this looks half baked. If your intent is to avoid any outgoing request, then becloader needs to be disabled as well.
I'm not even sure USE_WEB_CLIENT makes sense anymore, or it should be reconsidered more globally. I don't see the value so unless you're willing to do this global change, USE_WEB_CLIENT option will be removed (I.e. Always included)