* dnn(test): test DLDT IRv10 model, drop old models

* dnn(test): don't expect bitexact results in DLDT IR tests

Add CP-VTON sample

* Support resize from PyTorch

* Add CP-VTON sample

* Fix downsampling

* Fix test

* Add model links

* Add default args

* Speed up resize

* Fix TOM link

* Add default args

* Fix comments

* Set aspect ratio for input

* Update links

* Check files exist

fixed cv::moveWindow() on mac

* fixed cv::moveWindow() on mac (issue #16343). Thanks to cwreynolds and saskatchewancatch for the help!

* fixed warnings about _x0 and _y0

* fixed warnings about _x0 and _y0

* Fix NN resize with dimentions > 4

* add test check for nn resize with channels > 4

* Change types from float to double

* Del unnecessary test file. Move nn test to test_imgwarp. Add 5 channels test only.

* fixed typo

* add compatibility code to handle migration

* fixed Split layer in ONNXImporter

* added test for fix of split layer

* fixed tests for Split layer

* applied reviews

* updated tests

* fixed paths in tests

backporting of commit 98d96f2c

New class BufferArea is used to hide complexity of buffers allocations and allow instrumentation with valgrind and sanitizers.