shared/api: add local storage volume {copy,move}
shared/api: add local storage volume {copy,move}

Closes #3984.

Signed-off-by: Christian Brauner <48455ab3070520a2d174545c7239d6d0fabd9a83@ubuntu.com>
Signed-off-by: Kathryn E Baldauf <1fc40974ebd6478f8d730321607e214c5853c752@utexas.edu>
Signed-off-by: Jialin Li <42a5a389436084b5930fdd0bfcb9bdbc40ae0eff@utexas.edu>
Signed-off-by: Jasper Wu <042bfb865151393b7219f358e52c81bba595673e@utexas.edu>

atxwebs/lxd,stgraber/lxd,hallyn/lxd,mjeanson/lxd,jsavikko/lxd,atxwebs/lxd,stgraber/lxd,jsavikko/lxd,mjeanson/lxd,stgraber/lxd,lxc/lxd,pcdummy/lxd,Skarlso/lxd,hallyn/lxd,pcdummy/lxd,mjeanson/lxd,hallyn/lxd,hallyn/lxd,erikmack/lxd,jsavikko/lxd,Skarlso/lxd,erikmack/lxd,pcdummy/lxd,hallyn/lxd,stgraber/lxd,Skarlso/lxd,lxc/lxd,stgraber/lxd,lxc/lxd,lxc/lxd,atxwebs/lxd,erikmack/lxd,stgraber/lxd,lxc/lxd,stgraber/lxd,atxwebs/lxd,lxc/lxd,hallyn/lxd,Skarlso/lxd,lxc/lxd