[IR] Increase app flash size by using min_spiffs.csv (#1697)

fix #1690
avoid ESP32 not starting with IR environment

environments.ini

@@ -214,6 +214,7 @@ custom_description = RS232 reading of GridFree Sun Inverter
 [env:esp32dev-ir]
 platform = ${com.esp32_platform}
 board = esp32dev
+board_build.partitions = min_spiffs.csv
 lib_deps =
   ${com-esp32.lib_deps}
   ${libraries.irremoteesp}