feat($httpProvider): add 'useLegacyPromiseExtensions' configuration

The legacy methods, `success` and `error`, have been deprecated.

Set this to `false` to cause `$http` to throw an error if these methods are
used in the application.

For now it defaults to `true`. In a future release we will remove these
methods altogether.

DEPRECATION NOTICE:

The legacy methods 'success' and 'error' on promises returned by $http
are now deprecated.

Closes #12112
Closes #10508