ESP-NOW radios (ie, Generic_ESPNOW_* variants) do not compile due to
missing methods
Changes in January 2026 (019bbf74) to add additional stats (receive errors)
to CMD_GET_STATS was not implemented in the ESPNOWRadio() class
Changes in March 2026 (9a95e25e) to add setRxBoostedGainMode to all devices
rather than just SX1262/SX1268 were not applied to the ESPNowRadio() driver
Specifically, this change adds the following to ESPNOWRadio()
* getPacketsRecvErrors() - always returns 0
* getRxBoostedGainMode() - always returns false
* setRxBoostedGainMode() - does nothing
