Merge pull request #25075 from mshabunin:cleanup-imgproc-1

C-API cleanup: apps, imgproc_c and some constants #25075

Merge with https://github.com/opencv/opencv_contrib/pull/3642

* Removed obsolete apps - traincascade and createsamples (please use older OpenCV versions if you need them). These apps relied heavily on C-API
* removed all mentions of imgproc C-API headers (imgproc_c.h, types_c.h) - they were empty, included core C-API headers
* replaced usage of several C constants with C++ ones (error codes, norm modes, RNG modes, PCA modes, ...) - most part of this PR (split into two parts - all modules and calib+3d - for easier backporting)
* removed imgproc C-API headers (as separate commit, so that other changes could be backported to 4.x)

Most of these changes can be backported to 4.x.

modules/core/src/mathfuncs.cpp

@@ -1566,7 +1566,7 @@ bool checkRange(InputArray _src, bool quiet, Point* pt, double minVal, double ma
         {
             cv::String value_str;
             value_str << src(cv::Range(badPt.y, badPt.y + 1), cv::Range(badPt.x, badPt.x + 1));
-            CV_Error_( CV_StsOutOfRange,
+            CV_Error_( cv::Error::StsOutOfRange,
             ("the value at (%d, %d)=%s is out of range [%f, %f)", badPt.x, badPt.y, value_str.c_str(), minVal, maxVal));
         }
         return false;