cmake: Copy CMake's FindPythonInterp.cmake into the repo
cmake: Copy CMake's FindPythonInterp.cmake into the repo

Copy the 3.8.2 version of FindPythonInterp.cmake into the repo so that
we can patch it and fix #11103.

Signed-off-by: Sebastian Bøe <edee888afd63e94916688495334700803eba20a0@nordicsemi.no>

explora26/zephyr,nashif/zephyr,ldts/zephyr,ldts/zephyr,nashif/zephyr,Vudentz/zephyr,finikorg/zephyr,GiulianoFranchetto/zephyr,Vudentz/zephyr,galak/zephyr,galak/zephyr,explora26/zephyr,galak/zephyr,nashif/zephyr,Vudentz/zephyr,galak/zephyr,finikorg/zephyr,GiulianoFranchetto/zephyr,GiulianoFranchetto/zephyr,zephyrproject-rtos/zephyr,explora26/zephyr,ldts/zephyr,GiulianoFranchetto/zephyr,punitvara/zephyr,zephyrproject-rtos/zephyr,finikorg/zephyr,Vudentz/zephyr,punitvara/zephyr,explora26/zephyr,Vudentz/zephyr,zephyrproject-rtos/zephyr,GiulianoFranchetto/zephyr,explora26/zephyr,punitvara/zephyr,zephyrproject-rtos/zephyr,punitvara/zephyr,galak/zephyr,nashif/zephyr,nashif/zephyr,finikorg/zephyr,punitvara/zephyr,zephyrproject-rtos/zephyr,ldts/zephyr,ldts/zephyr,finikorg/zephyr,Vudentz/zephyr