Reduce USB static buffers for ESP32-S2

[tannewt]

This frees up more RAM for other things.

RAM started overflowing with #10281

[gamblor21]

Looks good to me pending it building (but several of the failing builds passed now so believe the rest will)

[Neradoc]

Will downsizing the USB CDC buffer make #4817 happen on the S2 like it does on the SAMD21 ? (which also uses 128)
Where the buffer is filled fast and that makes ctrl-C ignored.

[tannewt]

Will downsizing the USB CDC buffer make #4817 happen on the S2 like it does on the SAMD21 ? (which also uses 128) Where the buffer is filled fast and that makes ctrl-C ignored.

Yes, that will happen on the S2 just like on SAMD21.