Chore: capitalise logs in other backend packages (#74344)

* capitalise logs in observability logs

* capitalise oss-bit-tent packages

* capitalise logs in aws-datasources

* capitalise logs for traces and profiling

* capitalise logs for partner datasources

* capitalise logs in plugins platform

* capitalise logs for observability metrics

pkg/tsdb/testdatasource/testdata.go

@@ -35,7 +35,7 @@ func ProvideService() *Service {
 	var err error
 	s.sims, err = sims.NewSimulationEngine()
 	if err != nil {
-		s.logger.Error("unable to initialize SimulationEngine", "err", err)
+		s.logger.Error("Unable to initialize SimulationEngine", "err", err)
 	}
 
 	s.registerScenarios()