Introducing boundingRect2f() (#7754)

* Introducing boundingRect2f to return exact bounding float rectangle for RotatedRect

* Introducing boundingRect2f to return exact bounding float rectangle for RotatedRect

* Introducing boundingRect2f() - update

* Introducing boundingRect2f to return exact bounding float rectangle for RotatedRect

* Introducing boundingRect2f() - update - tested