[SourceKit] Remove OptimizeForIDE global configuration

Have SourceKit return locations for symbols outside of the current
module as well. Callsites of location and comment information should
explicitly disable retrieving serialized information where performance
is a concern.

Resolves rdar://75582627

tools/SourceKit/lib/SwiftLang/SwiftASTManager.cpp

@@ -421,7 +421,7 @@ bool SwiftASTManager::initCompilerInvocation(
   return ide::initCompilerInvocation(
       Invocation, OrigArgs, Diags, UnresolvedPrimaryFile, FileSystem,
       Impl.RuntimeResourcePath, Impl.DiagnosticDocumentationPath,
-      Impl.Config->shouldOptimizeForIDE(), Impl.SessionTimestamp, Error);
+      Impl.SessionTimestamp, Error);
 }
 
 bool SwiftASTManager::initCompilerInvocation(CompilerInvocation &CompInvok,