Previously, ToggleSuspend class checked 'os-rescue' policy for resuming
an instance. To align to resume operation, this fix changes to
'os-suspend-server:resume'.
Closes-Bug: #1963652
Change-Id: If6386ecdb81fb1f0d88dab447ee81c251b9857b7
(cherry picked from commit 29da801528)
(cherry picked from commit db40c8ceb6)