feat: implement DynamoDBDataSource + tests #1880

Job	Run time
build-test-server-windows-curl	19m 26s
build-test-server-mac	6m 19s
contract-tests-curl	4m 0s
build-test-server-mac-curl	5m 11s
build-test-server-windows	17m 49s
build-test-server-curl	8m 28s
contract-tests	4m 42s
build-test-server	8m 18s
	1h 14m 13s

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