[CK_BUILDER] Debug utilities (#3528)

* ck-builder: make toString to_string

We are using snake case for CK-Builder

* ck-builder: add debug.hpp with tensor descriptor printing function

This adds some initial functionality to debug.hpp, a header which will
be used to house some debug utilities.

* ck-builder: abstract nd-iteration

Abstracting this makes it easier to test, clearer, and allows us to
use it elsewhere (such as in debug.hpp soon)

* ck-builder: tensor printing

* ck-builder: rename INT32 to I32

This makes it more in line with the other data type definitions.

experimental/builder/include/ck_tile/builder/testing/validation.hpp

@@ -7,7 +7,6 @@
 #include "ck_tile/builder/testing/tensor_buffer.hpp"
 #include "ck_tile/builder/testing/tensor_foreach.hpp"
 #include "ck_tile/builder/factory/helpers/ck/conv_tensor_type.hpp"
-#include "ck/library/utility/check_err.hpp"
 #include "ck/utility/type_convert.hpp"
 #include <string_view>
 #include <vector>