[clang] [clang][ASTImporter] Not using primary context in lookup table (PR #118466)

[Michael Buch via cfe-commits]

https://github.com/Michael137 commented:

LLDB doesn't use the `LookupTable` infrastructure here so my understanding of this is limited. Generally the idea makes sense to me. Just left some clarification questions for my own understanding.

Does this have any affect on other redeclarable `DeclContext`s such as class forward declarations?

https://github.com/llvm/llvm-project/pull/118466