ci_template: Use a runner host-mapped volume for the ccache directory
Use hardcoded path for the cache, so it will be shared by all jobs of all gstreamer projects running on the same runner host. This should increase the hit rate and decrease the worst case storage used.
Adaptation of mesa/mesa!2818 (merged)
See freedesktop/freedesktop#120 (closed)
Close #27 (closed)
Edited by Jordan Petridіs