[temp-rvalue-opt] Update temp-rvalue-opt for OSSA.

The pass is already setup for OSSA, so I just enabled it for ownership and
converted its tests over. Eventually, I am going to be able to add support for
eliminating alloc_stack that have a loadabel value and whose lifetime are ended
via a load [take]. But that will be in a forthcoming commit.

Author: gottesmm

lib/SILOptimizer/Transforms/TempRValueElimination.cpp

@@ -393,9 +393,6 @@ bool TempRValueOptPass::tryOptimizeCopyIntoTemp(CopyAddrInst *copyInst) {
 
 /// The main entry point of the pass.
 void TempRValueOptPass::run() {
-  if (getFunction()->hasOwnership())
-    return;
-
   LLVM_DEBUG(llvm::dbgs() << "Copy Peephole in Func "
                           << getFunction()->getName() << "\n");