RCPP-63 Switch to using Baasaas for sync tests #88

Job	Run time
build (ubuntu-latest, Debug, True)	11m 47s
build (ubuntu-latest, Debug, False)	11m 57s
build (ubuntu-latest, Release, True)	10m 11s
build (ubuntu-latest, Release, False)	9m 32s
build (windows-latest, Debug, True)	20m 32s
build (windows-latest, Debug, False)	20m 49s
build (windows-latest, Release, True)	13m 42s
build (windows-latest, Release, False)	14m 24s
build (macos-latest, Debug, True)	6m 35s
build (macos-latest, Debug, False)	6m 32s
build (macos-latest, Release, True)	8m 9s
build (macos-latest, Release, False)	8m 9s
	2h 22m 19s

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