[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/test/conv/ck/test_ckb_conv_fwd_1d_i8.cpp

@@ -22,7 +22,7 @@ TEST(FwdConvInstances,
     constexpr ConvSignature FwdConvSignature{.spatial_dim            = 1,
                                              .direction              = FORWARD,
                                              .data_type              = I8,
-                                             .accumulation_data_type = INT32,
+                                             .accumulation_data_type = I32,
                                              .input                  = {.config = {.layout = GNWC}},
                                              .weight                 = {.config = {.layout = GKXC}},
                                              .output = {.config = {.layout = GNWK}}};