[ownership] Do some preliminary work for moving OME out of the diagnostics pipeline.

This disables a bunch of passes when ownership is enabled. This will allow me to
keep transparent functions in ossa and skip most of the performance pipeline without
being touched by passes that have not been updated for ownership.

This is important so that we can in -Onone code import transparent functions and
inline them into other ossa functions (you can't inline from ossa => non-ossa).

lib/SILOptimizer/Transforms/CSE.cpp

@@ -1163,6 +1163,10 @@ class SILCSE : public SILFunctionTransform {
   bool RunsOnHighLevelSil;
   
   void run() override {
+    // FIXME: We should be able to support ownership.
+    if (getFunction()->hasOwnership())
+      return;
+
     LLVM_DEBUG(llvm::dbgs() << "***** CSE on function: "
                             << getFunction()->getName() << " *****\n");