core(tls): implement releasing of TLS on thread termination

- move TLS & instrumentation code out of core/utility.hpp
- (*) TLSData lost .gather() method (to dispose thread data on thread termination)
- use TLSDataAccumulator for reliable collecting of thread data
- prefer using of .detachData() + .cleanupDetachedData() instead of .gather() method

(*) API is broken: replace TLSData => TLSDataAccumulator if gather required
(objects disposal on threads termination is not available in accumulator mode)

modules/core/src/umatrix.cpp

@@ -43,6 +43,8 @@
 #include "opencl_kernels_core.hpp"
 #include "umatrix.hpp"
 
+#include <opencv2/core/utils/tls.hpp>
+
 ///////////////////////////////// UMat implementation ///////////////////////////////
 
 namespace cv {