Move HTTPService and ConfigService into services package (#9422)

* Move HTTPService and ConfigService into utils package

* Re-add StaticConfigService

* Move config and http services into their own packages

app/app.go

@@ -25,6 +25,7 @@ import (
 	"github.com/mattermost/mattermost-server/mlog"
 	"github.com/mattermost/mattermost-server/model"
 	"github.com/mattermost/mattermost-server/plugin"
+	"github.com/mattermost/mattermost-server/services/httpservice"
 	"github.com/mattermost/mattermost-server/store"
 	"github.com/mattermost/mattermost-server/store/sqlstore"
 	"github.com/mattermost/mattermost-server/utils"
@@ -101,7 +102,7 @@ type App struct {
 
 	phase2PermissionsMigrationComplete bool
 
-	HTTPService HTTPService
+	HTTPService httpservice.HTTPService
 }
 
 var appCount = 0
@@ -128,7 +129,7 @@ func New(options ...Option) (outApp *App, outErr error) {
 		licenseListeners: map[string]func(){},
 	}
 
-	app.HTTPService = MakeHTTPService(app)
+	app.HTTPService = httpservice.MakeHTTPService(app)
 
 	app.CreatePushNotificationsHub()
 	app.StartPushNotificationsHubWorkers()