cmake: update PDB support condition

Unfortunately there is no stable support for installation of PDB files in CMake.
This patch is just eliminate problems with modern versions.

(2.4) Backports from master branch (#7854)

(2.4) Build with ICC

(2.4) Fix CUDA warnings

Examples:
- NPP_staging.cu:1606:105: warning: dereferencing type-punned pointer will break strict-aliasing rules [-Wstrict-aliasing]
- NCVHaarObjectDetection.hpp:95:37: warning: dereferencing type-punned pointer will break strict-aliasing rules [-Wstrict-aliasing]

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

Useful for debug purposes:
    cmake -DDEBUG_POST="ocv_cmake_dump_vars(CUDA)" .
    cmake -DCMAKE_PRE="ocv_cmake_dump_vars(\"OPENCL|opencl\")" .