Enable -Werror=old-style-definition against more ports

[jepler]

[some of these I can't build at all on my travel laptop so I'll be using CI as a crutch a bit more than usual]

[jepler]

I'm surprised that this one affected just one board

../../shared-module/usb_cdc/__init__.c:359:8: error: old-style function definition [-Werror=old-style-definition]
  359 | size_t vendor_ms_os_20_descriptor_length() {

it seems to be a function that may only be built when CIRCUITPY_USB_VENDOR is enabled, which has something to do with webserial. but isn't webserial enabled across multiple boards? Is this a vestige?

[eightycc]

Nice finish. Thank you!