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

[Felipe de Azevedo Piovezan via cfe-commits]

felipepiovezan wrote:

I reverted locally and confirmed that it was this commit that introduced the regression. I don't know much about clang importer to be honest, but this can be reproed by adding `lldb` to the list of projects to build, then building the `check-lldb` target. 
You can stop the job once the build steps are done and running just the one test with `<build>/bin/llvm-lit -v /lldb/test/API/commands/expression/import-std-module/array/TestArrayFromStdModule.py`

If you want to attach a debugger to it, you could also: `<build>/bin/lldb-dotest -p TestArrayFromStdModule -d`.
This will print the PID of the underlying process and you can attach a debugger and `continue`.

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