[clang] [llvm] [OffloadBundler] Rework the ctor of `OffloadTargetInfo` to support AMDGPU's generic target (PR #122629)

[Shilei Tian via llvm-commits]

shiltian wrote:

> So at least a few direct users this may break things for. There are also users that call the OffloadBundler API instead of directly calling clang-offload-bundler that this may impact.

For the API usage there will be no issue because we enforce it in the code already. The only part needs to be updated is those binary user.

https://github.com/llvm/llvm-project/pull/122629