Add test recordings for safeguards with PSS support

- Add test_aks_deployment_safeguards_basic.yaml recording
- Add test_aks_deployment_safeguards_with_pss.yaml recording
- Add test_aks_deployment_safeguards_argument_validation.yaml recording
- Fix test name prefixes to avoid randomness validation errors
- Sanitized subscription IDs with nil UUID (00000000-0000-0000-0000-000000000000)
- Revert azext_metadata.json minCliCoreVersion to 2.73.0

Author: ShantingLiu

src/aks-preview/azext_aks_preview/azext_metadata.json

@@ -1,5 +1,5 @@
 {
     "azext.isPreview": true,
-    "azext.minCliCoreVersion": "2.75.0",
+    "azext.minCliCoreVersion": "2.73.0",
     "name": "aks-preview"
 }