EZP-23534: Log error if source image doesn't exist

Closes #1060, #1020
EZP-23534: Catching NotResolvableException
EZP-23534: Added new tests for AliasGenerator
EZP-23534: Moved SourceImageNotFoundException to eZ\Publish\Core\MVC\Exception
EZP-23534: Adapt AliasGenerator underlying services (BinaryLoader and IORepositoryResolver)

Ensure that appropriate exceptions are thrown when:

* Binary files returned by IOService are invalid (`MissingBinaryFile`).
* NotFound exceptions are caught.