task: add download artifacts method #559

Job	Run time
test (20.x)	3m 36s
codeql / Analyze (actions)	1m 15s
codeql / Analyze (javascript-typescript)	1m 28s
test (18.x)	3m 55s
build-docs	-1s
run-ketryx-report	-1s
release	-1s
	10m 11s

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