GitLab

* Enable AVX by default

* Fix linting errors

* Fix win64 build (libxsmm not linked)

Libxsmm on Win64 is not linked, should be disabled by default

* Fix clang format issues

* Change lower supported cpu version to LIBXSMM_X86_AVX2

Change lower supported cpu version to LIBXSMM_X86_AVX2 to address https://github.com/dmlc/dgl/issues/3459

 issue

* Fix unit test

Remove assumption that libxsmm is enabled in the config by default (only true for intel CPUs with AVX2 instructions)

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Co-authored-by: Ubuntu <ubuntu@ip-172-31-15-137.us-west-2.compute.internal>
Co-authored-by: Quan (Andy) Gan <coin2028@hotmail.com>