Generate value filters for element-wise tests

[honno]

Currently we parse the spec and generate tests for special cases. How about we use that machine reading to also generate the filter_ we pass to the element-wise tests?

array-api-tests/array_api_tests/test_operators_and_elementwise_functions.py

Lines 93 to 97 in adfee28

	# Values which are special-cased are generated and passed, but are filtered by
	# the `filter_` callable before they can be asserted against `refimpl`. We
	# automatically generate tests for special cases in the special_cases/ dir. We
	# still pass them here so as to ensure their presence doesn't affect the outputs
	# respective to non-special-cased elements.

I notice we actually have some incorrect filters (will explore, didn't want to change incase I'm missing other concerns + need to document if so), so this should help with accuracy as well as maintenance.