Update Custom Op Template Gen based on recent changes (#371)

* Added initial CustomOp template generator

* Added arg parsing, error check, and modularized methods

* Added test and models for the same plus refactored code in template generator

* Fixed model path issue

* Final changes

* Removed ONNX models and added model generation in test scripts, changed custom ops to random math ops

* Update based on new custom op changes

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Co-authored-by: Sayan Shaw <sayanshaw@microsoft.com>

tools/gen_customop_template.py

@@ -42,10 +42,6 @@ def create_hpp(customop_template_filepath, op, op_name, input_type_count, output
     #include "string_utils.h"
     #include "ustring.h"
 
-    void* {custom_op}::CreateKernel(const OrtApi& api, const OrtKernelInfo* info) const {{
-      return CreateKernelImpl(api, info);
-    }};
-
     const char* {custom_op}::GetName() const {{ return "{op_name}"; }};
 
     size_t {custom_op}::GetInputTypeCount() const {{