Refactor(policy-set): convert list to Iterator pattern

[TanyaSingh369-svg]

Description

Refactored Policy Set resource listing from the previous ModelList-style return to an iterator pattern.

This aligns PolicySets.list() with other iterator-based resources and enables lazy pagination via the shared _Service._list helper.

Changes include:

• Converted PolicySets.list() to return Iterator[PolicySet] (generator-based) instead of a list wrapper
• Removed unused PolicySetList import from policy_set.py
• Verified that the required PolicySet models are already correctly exported in models/__init__.py (no update needed)

Testing

-- 396 unit tests passing

-- Policy set related tests verified:
PYTHONPATH=. pytest -v tests/units -k policy_set
→ 14 passed

-- Example updated and verified:
examples/policy_set.py runs successfully with iterator output

-- Models unchanged for backward compatibility

Output from tests

Output from Unit Test

Unit test

Output from Examples

[isivaselvan]

Update the examples, models for policy_set and add the output of examples/policy_set.py in the conversation.