[Console] Add methods for check verbosity of the output

| Q             | A
| ------------- | ---
| New feature?  | yes
| License       | MIT

Added to interface of the output, methods that are all implementations of the output classes ([1](https://github.com/symfony/symfony/blob/master/src/Symfony/Component/Console/Output/Output.php#L101), [2](https://github.com/symfony/symfony/blob/master/src/Symfony/Component/Console/Output/NullOutput.php#L78)) and [expected in other implementations](https://github.com/symfony/symfony/blob/master/src/Symfony/Bundle/FrameworkBundle/Command/CacheClearCommand.php#L99).

In my project, created a proxy class that implements the interface to output, but found that is not enough.