fix(test): fix snapshot artifact discovery on aarch64

Two bugs were preventing cross-kernel restore tests from running:

  1. The glob pattern only searched one level deep under
     snapshot_artifacts/, but Phase 1 artifacts are nested under an
     additional test-name directory. Use recursive glob (**/) to find
     snapshot directories regardless of nesting depth.

  2. The "None" CPU template was only added to the search list on
     x86_64, so on aarch64 instances where get_supported_cpu_templates()
     returns an empty list (e.g. Neoverse N1), the loop yielded zero
     pytest parameters and the test was silently skipped. Always
     include "None" in the search list.

Signed-off-by: Jack Thomson <jackabt@amazon.com>

Author: JackThomson2

tests/integration_tests/functional/test_snapshot_restore_cross_kernel.py

@@ -5,7 +5,6 @@
 
 import json
 import logging
-import platform
 from pathlib import Path
 
 import pytest
@@ -71,12 +70,9 @@ def get_snapshot_dirs():
     """Get all the snapshot directories"""
     snapshot_root_name = "snapshot_artifacts"
     snapshot_root_dir = Path(FC_WORKSPACE_DIR) / snapshot_root_name
-    cpu_templates = []
-    if platform.machine() == "x86_64":
-        cpu_templates = ["None"]
-    cpu_templates += get_supported_cpu_templates()
+    cpu_templates = ["None"] + get_supported_cpu_templates()
     for cpu_template in cpu_templates:
-        for snapshot_dir in snapshot_root_dir.glob(f"*_{cpu_template}_guest_snapshot"):
+        for snapshot_dir in snapshot_root_dir.glob(f"**/*_{cpu_template}_guest_snapshot"):
             assert snapshot_dir.is_dir()
             yield pytest.param(snapshot_dir, id=snapshot_dir.name)