Base64 functions refactoring

ClémenceHim
2023-09-28T08:18:40Z

https://gitlab.linphone.org/BC/public/bctoolbox/-/merge_requests/241

https://gitlab.linphone.org/BC/public/liblinphone/-/merge_requests/2706

https://gitlab.linphone.org/BC/public/mediastreamer2/-/merge_requests/873

https://gitlab.linphone.org/BC/public/msopenh264/-/merge_requests/21

https://gitlab.linphone.org/BC/public/mswebrtc/-/merge_requests/19

https://gitlab.linphone.org/BC/public/ortp/-/merge_requests/159

https://gitlab.linphone.org/BC/private/tunnel/-/merge_requests/22