[clang] [Clang] skip default argument instantiation for non-defining friend declarations without specialization info to meet [dcl.fct.default] p4 (PR #113777)

[Oleksandr T. via cfe-commits]

a-tarasyuk wrote:

@alanzhao1 thanks for catching that. should I revert it?

https://github.com/llvm/llvm-project/pull/113777