[CodeCompletion] Don't recommend functions with async alternatives in async contexts

When an function has an async alternative, that should be preferred when we are completing in an async context. Thus, the sync method should be marked as not recommended if the current context can handle async methods.

rdar://88354910

tools/SourceKit/lib/SwiftLang/CodeCompletionOrganizer.cpp

@@ -1168,7 +1168,8 @@ Completion *CompletionBuilder::finish() {
             contextFreeBase.getKind(),
             contextFreeBase.getOpaqueAssociatedKind(), opKind,
             contextFreeBase.isSystem(), contextFreeBase.isAsync(),
-            newCompletionString, contextFreeBase.getModuleName(),
+            contextFreeBase.hasAsyncAlternative(), newCompletionString,
+            contextFreeBase.getModuleName(),
             contextFreeBase.getBriefDocComment(),
             contextFreeBase.getAssociatedUSRs(),
             contextFreeBase.getResultType(),