Split capability negotiation, single call, secure group chat, message, ephemeral message and audio video conference test suites

Update Readme for Windows and Mac

Fix wrong reason on call termination (user reason was overriden by 'Declined'). Create a new reason : Transferred. Propagate user reason to call session. Play ring tone only if tone indications are enabled.

Fix external projects in LinphoneSdkPlatforms (Desktop and mac) to use a list of paths for CMAKE_PREFIX_PATH

Add a way to export OpenSSL libraries when needed (OpenLDAP) and rewrite OpenSSL link rpath to avoid absolute link Mac : Fix TLS and build for OpenLDAP

CI : OpenSSL cannot be found on Debian10 but it is required by OpenLDAP. Remove it from build on Debian10.

Add a way to export OpenSSL libraries when needed (OpenLDAP) and rewrite OpenSSL link rpath to avoid absolute link.
Mac : Fix TLS for OpenLDAP
Fix tester debugging on OpenLDAP

Mac multi-arch: final folder = desktop

Mac: fix folder

Mac : fix OpenH264 build

OpenH264 build for multi-arch Mac.
Fix bad parameter name on lcb_extra_cxxflags

Optimize Lipo : do mix on all 'architectured' files without restrictions on folder types

Opus : Presuming Neon on arm64/apple

Apple build: Force build to Macos platform if Desktop has been requested

Macos: Propagate versions variables on cmake and add feedback on host architecture

Debug CMAKE_APPLE_SILICON_PROCESSOR and set it to arm64 from CI

VPX : fix mac build for arm64

Add Arm64 and x86_64 builds for Mac. Fix supports for vpx, opus and openh264.
Fix Xcode build

Use call State when streaming/Paused/PausedByRemote in tonemanager to avoid to loose state connection when playing tone.
Play error tone only if tone indications are enabled.

- Fix tonemanager on infinite rings and wrong ring type. Add test on multicall. Synchronyze tonemanager with DTMF callback and on chaing state like Paused/Streaming running to continue ringing if needed.
- Add end callback on dtmfgen
- fix MSQogl crash on asynchronous deletion
- fix msopenH264 on C++11 support

Add option to deactivate potentially weak digest authentication schemes such as MD5 and operation without client nonce (no qop parameter).

Fixed double "variables" key declaration, which erased subkeys of the first "variables", causing rsync (and upload) to fail