Added option of setting query hints

[juniwalk]

I found myself in need of setting query hints in DoctrineDataSource. I implemented this functionality as I thought it would be good to use.

[paveljanda]

@juniwalk Could you pls fix phpstan errors?

@f3l1x Could you please check it? I am not using doctrine myself so it would be better if you review it. Thanks 👍

[juniwalk]

@paveljanda already working on it.

[juniwalk]

@paveljanda @f3l1x Hello, anything new? :) For review all you need is to check this method.

[f3l1x]

It's ok. Thanks @juniwalk