Renames crypto functions of ESP32 SDK in vendor code to resolve the conflicts between `wpa-supplicant` crypto functions and RIOT's `crypto` and `hashes` modules.
To resolve the conflicts between `wpa-supplicant` crypto functions (part of the ESP32 SDK) and RIOT's `crypto` and `hashes` modules, the crypto function headers from ESP32 SDK are added to vendor code and the crypto functions are renamed using the prefix `wpa_`.
