[clang] [llvm] Enable LLDB tests in pre-merge CI (PR #94208)

[David Spickett via cfe-commits]

DavidSpickett wrote:

> I'll do that, but I think LLDB should follow the example of MLIR here

https://github.com/llvm/llvm-project/pull/94220

https://github.com/llvm/llvm-project/pull/94208