Tests

Fix #516 -- fix regression forbidding setting GFK by a function (#515) #391

Job	Run time
linters (ruff check --output-format=github .)	16s
linters (ruff check --output-format=github .)	16s
linters (black --check --diff .)	13s
linters (black --check --diff .)	13s
Python 3.8	1m 15s
Python 3.8	1m 15s
linters (mypy model_bakery)	18s
linters (mypy model_bakery)	18s
Python 3.9	1m 17s
Python 3.9	1m 17s
Python 3.10	2m 9s
Python 3.10	1m 57s
Python 3.11	2m 22s
Python 3.11	2m 47s
Python 3.12	2m 6s
Python 3.12	2m 9s
Python 3.13	2m 14s
Python 3.13	2m 18s
Coverage	0s
Coverage	9s
	24m 49s

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