refactor: Implement FDv2 Wire Format + Payload Parser #2718

Job	Run time
build-test-client-windows-curl	15m 56s
build-test	6m 20s
build-test-client-windows	16m 7s
build-test-curl	6m 24s
contract-tests	3m 33s
build-test-client-mac-curl	5m 11s
contract-tests-curl	3m 25s
build-test-client-mac	3m 57s
	1h 0m 53s

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