Add @method annotation to ConnectionInterface.
Add @method annotation to ConnectionInterface.

Closes #13814

ndm2/cakephp,cakephp/cakephp,cakephp/cakephp,ndm2/cakephp,CakeDC/cakephp,CakeDC/cakephp,ADmad/cakephp,cakephp/cakephp,ADmad/cakephp,ndm2/cakephp,CakeDC/cakephp,cakephp/cakephp,CakeDC/cakephp,ADmad/cakephp,ndm2/cakephp,ADmad/cakephp