[clang] [llvm] [BPF] Generate BTF info using 'btf:type_tag' annotation (PR #91424)

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eddyz87 wrote:

Hi @yonghong-song,

Could you please take a look at this pull request?
Rationale is here: https://github.com/llvm/llvm-project/pull/91422#issuecomment-2101104708

@dafaust, @jemarch, @4ast, fyi.

https://github.com/llvm/llvm-project/pull/91424