test: hugepages: Use wait_for_up in EPT violation test

We were doing a `wait_for_up` after snapshot restore (which is
nonsense), but not after boot. Move it to be after boot.

Signed-off-by: Patrick Roy <roypat@amazon.co.uk>

tests/integration_tests/performance/test_huge_pages.py

@@ -174,6 +174,7 @@ def test_ept_violation_count(
     vm.basic_config(huge_pages=huge_pages, mem_size_mib=256)
     vm.add_net_iface()
     vm.start()
+    vm.wait_for_up()
 
     metrics.set_dimensions(
         {
@@ -211,7 +212,6 @@ def test_ept_violation_count(
 
     with ftrace_events("kvm:*"):
         vm.restore_from_snapshot(snapshot, resume=True, uffd_path=SOCKET_PATH)
-        vm.wait_for_up()
 
         # Verify if guest can run commands, and also wake up the fast page fault helper to trigger page faults.
         vm.ssh.check_output(f"kill -s {signal.SIGUSR1} {pid}")