fixed AirM2M_CORE_ESP32C3 upload.tool.serial & write_flash error (#7375)

Co-authored-by: Jan Procházka <90197375+P-R-O-C-H-Y@users.noreply.github.com>

boards.txt

@@ -17530,6 +17530,8 @@ AirM2M_CORE_ESP32C3.vid.0=0x303a
 AirM2M_CORE_ESP32C3.pid.0=0x1001
 
 AirM2M_CORE_ESP32C3.upload.tool=esptool_py
+AirM2M_CORE_ESP32C3.upload.tool.default=esptool_py
+AirM2M_CORE_ESP32C3.upload.tool.network=esp_ota
 AirM2M_CORE_ESP32C3.upload.maximum_size=1310720
 AirM2M_CORE_ESP32C3.upload.maximum_data_size=327680
 AirM2M_CORE_ESP32C3.upload.flags=
@@ -17624,6 +17626,11 @@ AirM2M_CORE_ESP32C3.menu.DebugLevel.debug.build.code_debug=4
 AirM2M_CORE_ESP32C3.menu.DebugLevel.verbose=Verbose
 AirM2M_CORE_ESP32C3.menu.DebugLevel.verbose.build.code_debug=5
 
+AirM2M_CORE_ESP32C3.menu.EraseFlash.none=Disabled
+AirM2M_CORE_ESP32C3.menu.EraseFlash.none.upload.erase_cmd=
+AirM2M_CORE_ESP32C3.menu.EraseFlash.all=Enabled
+AirM2M_CORE_ESP32C3.menu.EraseFlash.all.upload.erase_cmd=-e
+
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