IDF_PYTHON_ENV_PATH is the path where the Python environment is created
and used. By default it is inside IDF_TOOLS_PATH. IDF_PYTHON_ENV_PATH
was exported by idf_tools.py but was not imported back. This fixes the
issue and ESP-IDF will honor the value of IDF_PYTHON_ENV_PATH.
Closes https://github.com/espressif/esp-idf/issues/10489
On the build runners, the installation frequently takes around 150
seconds, which is above the current timeout. This change increases
the timeout.
Closes IDFCI-1436
