Example of backend query migration #1597

Job	Run time
setup-matrix	6s
run-integration-tests (./examples/app-with-extensions)	1m 23s
run-integration-tests (./examples/datasource-http)	1m 16s
run-integration-tests (./examples/panel-frame-select)	1m 16s
run-integration-tests (./examples/datasource-streaming-websocket/streaming-websocket-plugin)	1m 10s
run-integration-tests (./examples/panel-basic)	1m 24s
run-integration-tests (./examples/app-with-scenes)	1m 24s
run-integration-tests (./examples/datasource-basic)	1m 10s
run-integration-tests (./examples/app-with-rbac)	1m 12s
run-integration-tests (./examples/datasource-streaming-backend-websocket/streaming-backend-websoc...	1m 12s
run-integration-tests (./examples/app-with-extension-point)	1m 24s
run-integration-tests (./examples/panel-datalinks)	1m 23s
run-integration-tests (./examples/datasource-http-backend)	1m 10s
run-integration-tests (./examples/app-with-service-account)	1m 12s
run-integration-tests (./examples/app-with-dashboards)	1m 15s
run-integration-tests (./examples/app-with-backend)	1m 13s
run-integration-tests (./examples/app-basic)	1m 18s
run-integration-tests (./examples/datasource-logs)	1m 22s
notify	1s
	21m 51s

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