Replace publicroomsapi with a combination of clientapi/roomserver/currentstateserver (#1174)

* Use content_value instead of membership

* Fix build

* Replace publicroomsapi with a combination of clientapi/roomserver/currentstateserver

- All public rooms paths are now handled by clientapi
- Requests to (un)publish rooms are sent to the roomserver via `PerformPublish`
  which are stored in a new `published_table.go`
- Requests for public rooms are handled in clientapi by:
    * Fetch all room IDs which are published using `QueryPublishedRooms` on the roomserver.
    * Apply pagination parameters to the slice.
    * Do a `QueryBulkStateContent` request to the currentstateserver to pull out
      required state event *content* (not entire events).
    * Aggregate and return the chunk.

Mostly but not fully implemented (DB queries on currentstateserver are missing)

* Fix pq query

* Make postgres work

* Make sqlite work

* Fix tests

* Unbreak pagination tests

* Linting

clientapi/routing/createroom.go

@@ -410,6 +410,19 @@ func createRoom(
 		}
 	}
 
+	if r.Visibility == "public" {
+		// expose this room in the published room list
+		var pubRes roomserverAPI.PerformPublishResponse
+		rsAPI.PerformPublish(req.Context(), &roomserverAPI.PerformPublishRequest{
+			RoomID:     roomID,
+			Visibility: "public",
+		}, &pubRes)
+		if pubRes.Error != nil {
+			// treat as non-fatal since the room is already made by this point
+			util.GetLogger(req.Context()).WithError(pubRes.Error).Error("failed to visibility:public")
+		}
+	}
+
 	response := createRoomResponse{
 		RoomID:    roomID,
 		RoomAlias: roomAlias,