Allow user to select specific ESP_TARGET while setting up ESD_IDF. Only necessary tools for given target will be downloaded and installed. Closes https://github.com/espressif/esp-idf/issues/5113
Install and export script should work on systems without "python" executable. Closes https://github.com/espressif/esp-idf/pull/6471 Closes https://github.com/espressif/esp-idf/issues/6532 Related to https://github.com/espressif/esp-idf/issues/6421 and https://github.com/espressif/arduino-esp32/issues/4717