CherryPicked: [cnv-4.22] [virt] fix test_restart_persistence_windows failing on ssh timeout (#5141)

Cherry-pick from `main` branch, original PR:
#5103, PR
owner: vsibirsk

Signed-off-by: Vasiliy Sibirskiy <vsibirsk@redhat.com>
Co-authored-by: Vasiliy Sibirskiy <vsibirsk@redhat.com>

Author: cnv-tests-github-webhook-dollierp[bot]

utilities/virt.py

@@ -2762,7 +2762,7 @@ def run_os_command(vm: VirtualMachineForTests, command: str) -> str | None:
         return run_ssh_commands(
             host=vm.ssh_exec,
             commands=shlex.split(command),
-            timeout=5,
+            timeout=15,
             tcp_timeout=TCP_TIMEOUT_30SEC,
         )[0]
     except ProxyCommandFailure: