resolves #19769

To fix for #19769 (also all samples from #11915 work).

1. Error in function static void rotatingCalipers( const Point2f* points, int n, int mode, float* out ).
2. Calculating the minimum angle between calipers side and polygon edge using the cosine results in an incorrect angle due to limited arithmetic accuracy.
3. Replaced vector sorting by angle cosine with sorting with custom comparator. The comparator determins vector order by dot product sign to fix floating point accuracy issue with colinear and close to colinear vectors.
4. Added tests "reproducer_19769" and "reproducer_19769_lightweight".

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