aout: check clock_id before filtering the block + small fixes

Follows up !5630 (08b1c8e1)

changed milestone to %4.0

added Component::Core: Audio output Component::Core: Clock labels

added MRStatus::Reviewable label

added 72 commits

• 0aa8eed6...b9406311 - 68 commits from branch videolan:master
• 99c59cb1 - aout: assert that pts from filters are valid
• 79f2974e - aout: don't trigger a discontinuity if not played
• 22bbb1ec - aout: add intermediate stream_ClockConvert()
• 307eef5e - aout: convert pts before filtering the input block

Compare with previous version

added MRStatus::Accepted label and removed MRStatus::Reviewable label

MR Acceptance result

This MergeRequest has been Accepted! Congratulations.

MR acceptance checks details:

• MR should be considered mergeable by Gitlab
• Last pipeline should be successful
• No activity on MR (no thread, no vote) and last update is long enough

This message was automatically generated by homer-bot.

added 48 commits

• 307eef5e...18a08937 - 44 commits from branch videolan:master
• f0c3760f - aout: assert that pts from filters are valid
• 1ed24f11 - aout: don't trigger a discontinuity if not played
• 67eef6d2 - aout: add intermediate stream_ClockConvert()
• 7dc7847c - aout: convert pts before filtering the input block

Compare with previous version

enabled an automatic merge when the pipeline for 7dc7847c succeeds

merged