Allow $_dataName in TestDoxFormatter #6534
Description
When using #[TestDox('string here')] with a data provider, it's possible to reference $_dataName to get the name of the dataset.
When using #[TestDoxFormatter('someMethod')] with a callback, there is no way to access the dataset name. Only the parameters.
It would be helpful (and complete the feature) if $_dataName could be made available somehow. Perhaps a magic param name detected by reflection?