[inductor] enable descriptive name for cpp kernels (#101330)
This PR enables the descriptive name for cpp kernels similar to the triton kernel name. A new configuration `config.cpp.descriptive_names` is added similar to that of triton. The kernel name follows the format: `cpp_<fused_name>_<id>`.
Pull Request resolved: https://github.com/pytorch/pytorch/pull/101330
Approved by: https://github.com/XiaobingSuper, https://github.com/jansel
