fix: resolve arrays of unions and unions of arrays properly #1399

Job	Run time
ash-ci / MIX_ENV=test mix.compile	2m 39s
ash-ci / audit	2m 32s
ash-ci / mix igniter.upgrade	7s
ash-ci / mix docs	2m 12s
ash-ci / mix format --check-formatted	1m 11s
ash-ci / mix spark.formatter --check	1m 16s
ash-ci / mix credo --strict	1m 15s
ash-ci / mix deps.unlock --check-unused	1m 15s
ash-ci / mix test	1m 47s
ash-ci / mix sobelow	1m 16s
ash-ci / mix dialyzer	5m 51s
ash-ci / MIX_ENV=dev mix.compile	2m 19s
ash-ci / mix spark.cheat_sheets --check	1m 15s
ash-ci / mix ash.codegen --check	-1s
ash-ci / Deploy docs to GitHub pages.	11s
ash-ci / format('NIF {0} - {1} ({2})', matrix.nif, matrix.job.target, matrix.job.os)	0s
ash-ci / Release	0s
	25m 5s

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