[libclc] [llvm] [CI][libclc] Enable libclc in premerge CI with single target (PR #186104)

[Matt Arsenault via cfe-commits]

arsenm wrote:

This seems to always fail on trying to use llvm-dis, e.g., https://github.com/llvm/llvm-project/actions/runs/23184754941?pr=186973

https://github.com/llvm/llvm-project/pull/186104