[llvm] [offload] Fix link issues when LLVM_LINK_LLVM_DYLIB on (PR #106583)

[Joseph Huber via llvm-commits]

jhuber6 wrote:

> > I thought we did use `add_llvm_library`. We should probably just move the libraries there if so.
> 
> We do for `omptarget`. But not for libraries under `plugins-nextgen`.
> 
> The newly introduced failure is due to this transitive relationship:
> 
> ```
> omptarget -> PluginCommon -> LLVMProfileData
> ```

Can we fix that then?

https://github.com/llvm/llvm-project/pull/106583