feat: Add support for CURL networking. #2471

Job	Run time
contract-tests-curl	2m 53s
build-test	5m 53s
build-test-client-windows	16m 45s
contract-tests	3m 55s
build-test-client-windows-curl	16m 49s
build-test-curl	7m 39s
build-test-client-mac	11m 54s
build-test-client-mac-curl	9m 9s
	1h 14m 57s

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