port-specific modules not included in module support matrix

[dhalbert]

espcamera is not in the module support matrix, though it is turned on for a number of boards (e.g. Metro ESP32-S2). This may be due to its not being in shared-bindings, but in ports/espressif/bindings. That may be special-cased?

There are other missing modules, like samd and rp2pio.