Allow all binding methods on RX (#2542)

Allow all binding methods on RX (#2542)

* ESP8266 unified binding

* Bring TX up to date with new binding code

* Mistakenly checked this in

* Volatile bind, binding moved in RX webui

* Config update

* Unrelated STM32 fixes

* Fix STM32 flashing with same bind phrase

* Self review fixes

* Forgot the totally reset requirement

* Default wifi-on-interval for lll resets to 60s

* Reset config retains the domain

* FLASH_DISCRIM causing every target to always full rebuild

* make sure pwmChannels is aligned

* Note about BF passthrough changing RCVR_UART_BAUD

* Everyone uses EnterBindingModeSafely() now

* Pedantic debug

* wifi-on-interval was being forced to -1

* Increase timeouts, thanks PK

* Allow 4-6 bytes for raw UID binding

* Support bind CRSF command on TX too

* Use callback for TX binding

* Support bind CRSF command on RX via OTA

* I add one line of docs and typo it

* Allow patching flash_discriminator with binary_configurator.py

* Updates handset for binding

* Don't include flashdescrim.h in unit tests / TX