add other library files for exclusion in CodeQL as they are all from external repo https://github.com/Azure/azure-sdk-for-python/tree/main/sdk/storage

Author: calvinhzy

CodeQL.yml

@@ -1,4 +1,6 @@
 path_classifiers:
   library:
-    # Classify policies.py files as library code
-    - "azure/multiapi/storagev2/**/policies.py"
+    # Classify policies.py, _encryption.py, and _common_conversion.py files as library code
+    - "azure/multiapi/storagev2/**/policies.py"
+    - "azure/multiapi/storage/**/_encryption.py"
+    - "azure/multiapi/**/_common_conversion.py"