MM-27169: Remove uneeded fields from App (#15408)

* MM-27169: Remove uneeded fields from App

https://mattermost.atlassian.net/browse/MM-27169

* run app-layers

* Bring back searchengine

Co-authored-by: Mattermod <mattermod@users.noreply.github.com>

app/app_iface.go

@@ -296,6 +296,8 @@ type AppIface interface {
 	// the member's group memberships and the configuration of those groups to the syncable. This method should only
 	// be invoked on group-synced (aka group-constrained) syncables.
 	SyncSyncableRoles(syncableID string, syncableType model.GroupSyncableType) *model.AppError
+	// TODO: change this to make a server method.
+	SetLog(l *mlog.Logger)
 	// TeamMembersMinusGroupMembers returns the set of users on the given team minus the set of users in the given
 	// groups.
 	//
@@ -893,7 +895,6 @@ type AppIface interface {
 	SetContext(c context.Context)
 	SetDefaultProfileImage(user *model.User) *model.AppError
 	SetIpAddress(s string)
-	SetLog(l *mlog.Logger)
 	SetPath(s string)
 	SetPhase2PermissionsMigrationStatus(isComplete bool) error
 	SetPluginKey(pluginId string, key string, value []byte) *model.AppError