Support for LibreTiny platform (RTL8710, BK7231 & other modules) (#3509)

Co-authored-by: Kuba Szczodrzyński <kuba@szczodrzynski.pl>
Co-authored-by: Sam Neirinck <git@samneirinck.com>
Co-authored-by: David Buezas <dbuezas@users.noreply.github.com>
Co-authored-by: Stroe Andrei Catalin <catalin2402@gmail.com>
Co-authored-by: Sam Neirinck <github@samneirinck.be>
Co-authored-by: Péter Sárközi <xmisterhu@gmail.com>
Co-authored-by: Hajo Noerenberg <hn@users.noreply.github.com>

esphome/components/ota/ota_component.cpp

@@ -3,6 +3,7 @@
 #include "ota_backend_arduino_esp32.h"
 #include "ota_backend_arduino_esp8266.h"
 #include "ota_backend_arduino_rp2040.h"
+#include "ota_backend_arduino_libretiny.h"
 #include "ota_backend_esp_idf.h"
 
 #include "esphome/core/log.h"
@@ -39,6 +40,9 @@ std::unique_ptr<OTABackend> make_ota_backend() {
 #ifdef USE_RP2040
   return make_unique<ArduinoRP2040OTABackend>();
 #endif  // USE_RP2040
+#ifdef USE_LIBRETINY
+  return make_unique<ArduinoLibreTinyOTABackend>();
+#endif
 }
 
 OTAComponent::OTAComponent() { global_ota_component = this; }