[cinder][nova] volume-local-cache meeting results

Thanks to everyone who attended this morning, we had a productive meeting. If you missed it and want to know what happened: etherpad: https://etherpad.openstack.org/p/volume-local-cache recording: https://youtu.be/P9bouCCoqVo Liang Fang will be updating the specs to reflect what was discussed: cinder spec: https://review.opendev.org/#/c/684556/ nova spec: https://review.opendev.org/#/c/689070/ cheers, brian