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

[Michael Buch via cfe-commits]

Michael137 wrote:

> @Michael137 This is for Linux. Windows works the same way just below those lines:
> 
> https://github.com/llvm/llvm-project/blob/9a7bd8a60f03595be5d42315790df6d409f81091/.ci/generate-buildkite-pipeline-premerge#L253-L255

Ah, so what would the issue be with just adding more specific `check-lldb-*` targets, rather than all of `check-lldb`?

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