feat: Add support for CURL networking. #2508

Job	Run time
contract-tests	2m 45s
contract-tests-curl	2m 43s
build-test-client-windows	16m 13s
build-test-client-mac	8m 29s
build-test	5m 32s
build-test-client-mac-curl	13m 42s
build-test-client-windows-curl	16m 19s
build-test-curl	5m 27s
	1h 11m 10s

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