* remove operator size_t in dimension

* use get_length()

* transform uint64_t to size_t for func to_shape()

* more replacement of get_length

* more replacement of get_length in test

* make style-apply

* change in onnx

* more change onnx test

* fix build

* add size_t back to dldt test
will do another PR after dldt update
Co-authored-by: Scott Cyphers <diyessi@users.noreply.github.com>
Co-authored-by: Sang Ik Lee <sang.ik.lee@intel.com>
Co-authored-by: Robert Kimball <robert.kimball@intel.com>