[CodeComplete] Add option to add calls with no defaults (or not)

Now that arguments are marked up with whether they have a default or
not, clients may not need the extra call (that has no default
arguments). Add an option to allow not adding this item.

Resolves rdar://85526214.

tools/SourceKit/lib/SwiftLang/CodeCompletionOrganizer.h

@@ -45,6 +45,7 @@ struct Options {
   bool fuzzyMatching = true;
   bool annotatedDescription = false;
   bool includeObjectLiterals = true;
+  bool addCallWithNoDefaultArgs = true;
   unsigned minFuzzyLength = 2;
   unsigned showTopNonLiteralResults = 3;