Update getting pushrules, add tests, tweak pushrules (#2705)

This PR
- adds tests for `evaluatePushrules`
- removes the need for the UserAPI on the `OutputStreamEventConsumer`
(for easier testing)
- adds a method to get the pushrules from the database
- adds a new default pushrule for `m.reaction` events (and some other
tweaks)

userapi/userapi.go

@@ -18,6 +18,8 @@ import (
 	"time"
 
 	"github.com/gorilla/mux"
+	"github.com/sirupsen/logrus"
+
 	"github.com/matrix-org/dendrite/internal/pushgateway"
 	keyapi "github.com/matrix-org/dendrite/keyserver/api"
 	rsapi "github.com/matrix-org/dendrite/roomserver/api"
@@ -31,7 +33,6 @@ import (
 	"github.com/matrix-org/dendrite/userapi/producers"
 	"github.com/matrix-org/dendrite/userapi/storage"
 	"github.com/matrix-org/dendrite/userapi/util"
-	"github.com/sirupsen/logrus"
 )
 
 // AddInternalRoutes registers HTTP handlers for the internal API. Invokes functions
@@ -90,7 +91,7 @@ func NewInternalAPI(
 	}
 
 	eventConsumer := consumers.NewOutputStreamEventConsumer(
-		base.ProcessContext, cfg, js, db, pgClient, userAPI, rsAPI, syncProducer,
+		base.ProcessContext, cfg, js, db, pgClient, rsAPI, syncProducer,
 	)
 	if err := eventConsumer.Start(); err != nil {
 		logrus.WithError(err).Panic("failed to start user API streamed event consumer")