[clang] [serialization] no transitive decl change (PR #92083)

[David Spickett via cfe-commits]

DavidSpickett wrote:

Maybe you can run individual tests with lit but generally I use `lldb-dotest` instead:
```
./bin/lldb-dotest.py -p TestTemplateWithSameArg.py
```
(you only need the filename)

https://github.com/llvm/llvm-project/pull/92083