[clang] [clang-tools-extra] [llvm] [nfc][llvm-profdata] Use cl::Subcommand to organize subcommand and options in llvm-profdata (PR #71328)

[Mingming Liu via llvm-commits]

https://github.com/minglotus-6 commented:

thanks for the reviews!

https://github.com/llvm/llvm-project/pull/71328