ci: Add a separate job for testing with yasm

Only 64-bit for now.
5 jobs for <span class="ref-name">fix-ffmpeg-yasm</span> in 13 minutes and 15 seconds (queued for 1 second)
Status Job ID Name Coverage
  Build
passed #239945
no external deps

00:03:06

passed #239946
with deps

00:07:54

passed #239947
with deps yasm

00:07:56

 
  Build X86
passed #239948
no external x86

00:02:22

passed #239949
with deps x86

00:05:19