[CLML][CODEGEN] CLML native codegen utility

[srkreddy1238]

This util generates native CLML code given a DNN model. It does import via tvmc, extracts clml_modules, get the json source and finally generates clml_models.cc that holds source for various sub graphs. cpp_clml tool has additional infrastructure to compile it as a standalone binary that runs these models.

This PR adds symbol name to the generated json graph. Also, extends const_loader interface to get constant params.

[tvm-bot]

Thanks for contributing to TVM! Please refer to the contributing guidelines https://tvm.apache.org/docs/contribute/ for useful information and tips. Please request code reviews from Reviewers by @-ing them in a comment.

• No users to tag found in teams: clml, codegen _{See #10317 for details}

_{Generated by tvm-bot}

[TejashShah]

cc @elvin-n @echuraev @csullivan @masahi

[echuraev]

Thank you for the nice application! Quickly took a look at the PR. Some of the comments.

[echuraev]

Just another thought to discuss. Can we reuse somehow clml codegen from TVM? In this case is won't be necessary to support a script which generates clml code in this PR and when new operations will be added to clml runtime then they should be automatically supported by this application.

[srkreddy1238]

@echuraev thanks for a quick review.

CMAKE options are taken from CLML SDK release. Let me relook for 32bit support and other options.

I thought about clml runtime reuse. This require separating current clml_runtime into two parts one with TVM code (all json runtime and tvm dependencies) and other with only CLML SDK interface (no tvm dependencies here). Then we can simplify clml_runner.cc to use the above interface which is common. Too much of redesign now, probably I will take another pass for this later.

[echuraev]

In general LGTM. Several minor comments

[echuraev]

Could you please replace all NULL with nullptr?

[echuraev]

LGTM. Thanks