test: disable time_api_requests for cross-kernel snapshot tests

These tests run on ag=n buildkite workers (e.g. in parallel with other
test runs), which can cause contention on kernel locks. See also
ba7b6db.

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

tests/integration_tests/functional/test_snapshot_restore_cross_kernel.py

@@ -105,6 +105,7 @@ def test_snap_restore_from_artifacts(
     logger.info("Working with snapshot artifacts in %s.", snapshot_dir)
 
     vm = microvm_factory.build()
+    vm.time_api_requests = False
     vm.spawn()
     logger.info("Loading microVM from snapshot...")
     vm.restore_from_path(snapshot_dir)