refactor: add SSE Builder::on_response hook #2906

Job	Run time
contract-tests-curl	3m 45s
build-test-client-mac	4m 33s
build-test-curl	6m 2s
build-test-client-windows-curl	16m 11s
build-test-client-mac-curl	4m 34s
contract-tests	2m 55s
build-test-client-windows	14m 19s
build-test	5m 8s
	57m 27s

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