[llvm] [ctx_prof] Extend `WorkloadImportsManager` to use the contextual profile (PR #98682)

[Teresa Johnson via llvm-commits]

================
@@ -174,6 +174,10 @@ static cl::opt<std::string> WorkloadDefinitions(
              "}"),
     cl::Hidden);
 
+static cl::opt<std::string>
+    ContextualProfile("thinlto-pgo-ctx-prof",
----------------
teresajohnson wrote:

Can you add a test to exercise this handling?

https://github.com/llvm/llvm-project/pull/98682