Add bugfix with tests for `find_resource` #437

Job	Run time
unit_tests (3.7)	1m 28s
unit_tests (3.8)	1m 8s
unit_tests (3.9)	1m 13s
unit_tests (3.10)	1m 15s
unit_tests (3.11)	1m 12s
py_build_tests / relative_path_tests	7s
py_build_tests / py_build_tests	9s
	6m 32s

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