[llvm] [CI] Enable Offload project in precommit CI (PR #109103)

[Louis Dionne via llvm-commits]

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@@ -131,7 +131,7 @@ function add-dependencies() {
         echo $p
       done
     ;;
-    compiler-rt|libc|openmp)
+    compiler-rt|libc|offload|openmp)
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ldionne wrote:

This means that whenever the `offload` project gets built, `clang` and `lld` will also get built.

https://github.com/llvm/llvm-project/pull/109103