feat: implement DynamoDBDataSource + tests #2868

Job	Run time
build-test-client-mac-curl	4m 0s
contract-tests	3m 36s
contract-tests-curl	3m 34s
build-test-curl	6m 34s
build-test-client-mac	5m 28s
build-test-client-windows	14m 40s
build-test	6m 2s
build-test-client-windows-curl	14m 12s
	58m 6s

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