[clang] [Clang][Sema] Always use latest redeclaration of primary template (PR #114258)

[Krystian Stasiowski via cfe-commits]

sdkrystian wrote:

> Yup, that fixes the issue. I've also confirmed that reverting the fix brings back the crash!

Great!

> It is weird that you were unable to repro this 🤔 (or rather that it was also crashing when you reverted the original patch...) Are you 100% sure you recompiled LLDB after reverting?

So... I usually compile clang with msvc on windows (I would use clang-cl if VS2022 didn't hang when debugging). I've spent many hours trying to get LLDB to compile using my current environment without success, so I instead compile in WSL. Since `lldb/test/API/commands/expression/import-std-module/array/TestArrayFromStdModule.py` is unsupported on Linux, I just commented out `@skipIfLinux` so the test will at least run. The test fails for me locally, but when the patch is applied it doesn't crash.

https://github.com/llvm/llvm-project/pull/114258