ESP32 ability to disable serial

[bill88t]

As I am doing the t-energy port, I discovered that as the battery discharges the serial chip spams KeyboardInterrupt's to the serial console.
It wouldn't be an issue if I could just configure the usb_cdc console to disable serial.
But that is impossible on esp32 since there is no usb_cdc.

This board hates me.

This could alternatively be solved by #7857, as non-interrupting data can be ignored.

[tannewt]

usb_cdc is irrelevant here because ESP32 doesn't have native USB.

Seems to me that the USB to serial converter chip isn't working well when the battery dips. I'm not sure CP really needs to handle this.

I suppose we could disable serial workflow and only allow wifi. That's definitely advanced though.