ci: use draft releases to support immutable GitHub releases (#516) #3066

Job	Run time
build-test-client-windows	14m 58s
contract-tests	3m 12s
build-test-client-windows-curl	14m 48s
build-test	6m 14s
build-test-client-mac	5m 8s
build-test-client-mac-curl	4m 17s
build-test-curl	5m 59s
contract-tests-curl	3m 33s
	58m 9s

Provide feedback