chore: adds TestDataV2 to implement Synchronizer #306

Job	Run time
test-packaging	46s
test-platforms-and-versions (ubuntu-latest, 11)	48s
test-contract-tests	1m 2s
test-platforms-and-versions (ubuntu-latest, 8)	51s
test-platforms-and-versions (ubuntu-latest, 19)	50s
test-platforms-and-versions (ubuntu-latest, 17)	48s
	5m 5s

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