tests(hooks): refactor bulk ops tests to NamedTuple pattern

why: Follow existing test patterns using NamedTuple + parametrize
what:
- Replace TestBulkOperationsAPI class with BulkOpTestCase NamedTuple
- Add categorized test case lists: GET_INDICES, GET_VALUES, SET_BULK, etc.
- Create parametrized test_bulk_hook_operation() function
- Keep standalone tests for iteration, SparseArray input, and chaining

Squash to: fa12f04

Author: tony