[test_unshelve_to_specific_host] Skip test if no shelve support

Related-Prod: PRODX-45143
Change-Id: I7ad70752b25751f3ba884754bcd11d21db19ee46
(cherry picked from commit eb8ebd855aed7af442d92b3e4e3392ba25f1b217)
(cherry picked from commit 2d4204774bc4635418e992593914528911b4e7ff)
1 file changed