Extended several core functions to support new types (#24962)

* started adding support for new types (16f, 16bf, 32u, 64u, 64s) to arithmetic functions

* fixed several tests; refactored and extended sum(), extended inRange().

* extended countNonZero(), mean(), meanStdDev(), minMaxIdx(), norm() and sum() to support new types (F16, BF16, U32, U64, S64)

* put missing CV_DEPTH_MAX to some function dispatcher tables
* extended findnonzero, hasnonzero with the new types support

* extended mixChannels() to support new types

* minor fix

* fixed a few compile errors on Linux and a few failures in core tests

* fixed a few more warnings and test failures

* trying to fix the remaining warnings and test failures. The test `MulTestGPU.MathOpTest` was disabled - not clear whether to set tolerance - it's not bit-exact operation, as possibly assumed by the test, due to the use of scale and possibly limited accuracy of the intermediate floating-point calculations.

* found that in the current snapshot G-API produces incorrect results in Mul, Div and AddWeighted (at least when using OpenCL on Windows x64 or MacOS x64). Disabled the respective tests.

modules/core/src/mathfuncs.cpp

@@ -1137,7 +1137,7 @@ static void iPow64f(const double* src, double* dst, int len, int power)
 
 typedef void (*IPowFunc)( const uchar* src, uchar* dst, int len, int power );
 
-static IPowFunc ipowTab[] =
+static IPowFunc ipowTab[CV_DEPTH_MAX] =
 {
     (IPowFunc)iPow8u, (IPowFunc)iPow8s, (IPowFunc)iPow16u, (IPowFunc)iPow16s,
     (IPowFunc)iPow32s, (IPowFunc)iPow32f, (IPowFunc)iPow64f, 0