Remove incorrect "db.DefaultContext" usages (#35366)

models/db/engine.go

@@ -59,8 +59,14 @@ type Engine interface {
 	Cols(...string) *xorm.Session
 	Context(ctx context.Context) *xorm.Session
 	Ping() error
+	IsTableExist(tableNameOrBean any) (bool, error)
 }
 
+var (
+	_ Engine = (*xorm.Engine)(nil)
+	_ Engine = (*xorm.Session)(nil)
+)
+
 // TableInfo returns table's information via an object
 func TableInfo(v any) (*schemas.Table, error) {
 	return xormEngine.TableInfo(v)