Add a way to change volume on ALSA with MSFilterAudioPlaybackInterface and MSFilterAudioCaptureInterface

- Launch jobs only when in MR and when MR isn't in state Draft or nightly
- Now launches 30 parallel suites for linux tests per test job

Re-declares rules when there is a rule:never in a child job because rules are not transmitted via extends... 2 ways to workaround it, either use yaml anchors, or wait Gitlab 14.3 for reference keyword

Added SKIP_LINUX to build jobs to be able to skip linux builds in scheduled pipeline

Added workflow rules to see if the right pipelines are launched on merge request and schedules

Updated liblinphone with fix to prevent sending IMDN for IMDNs + performance optimisation when parsing multiple IMDNs at once

Fix possible REGISTER endless loop when 200 OK from REGISTER is not received through the same connection as the REGISTER.

- Fix daemon and V4L default build options.

MagicSearch : Add a test on peer address of room before cloning it. It may be NULL if the peer address is not valid.

(cherry-pick) When setting push tokens in the push configuration, set a flag to regenerate the pn-prid push parameters

Updated liblinphone with linphone_core_set_tone header fix + attempt to fix _JNIEnv::NewLocalRef(_jobject*) crash

Generated gitdescribe file on all unix platforms so the test reports upload job will get the right version