hook up `ott-vis-datasource` to `ott-vis` #2157

Job	Run time
lint (18.x)	4m 26s
grafana-compatibilitycheck (ott-vis)	2m 54s
grafana-compatibilitycheck (ott-vis-datasource)	3m 6s
test (18.x)	4m 7s
test (20.x)	4m 26s
Deploy docker image	0s
Deploy Monolith on fly.io (prod)	0s
Deploy Monolith on fly.io (staging)	0s
Deploy Balancer on fly.io (staging)	0s
	18m 59s

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