[llvm] [ORC] Replace ORC's baked-in dependence tracking with WaitingOnGraph. (PR #163027)

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``````````bash
git-clang-format --diff origin/main HEAD --extensions h,cpp -- llvm/include/llvm/ExecutionEngine/Orc/WaitingOnGraph.h llvm/unittests/ExecutionEngine/Orc/WaitingOnGraphTest.cpp llvm/include/llvm/ExecutionEngine/Orc/Core.h llvm/lib/ExecutionEngine/Orc/Core.cpp llvm/lib/ExecutionEngine/Orc/SimpleRemoteEPC.cpp llvm/unittests/ExecutionEngine/Orc/ReOptimizeLayerTest.cpp --diff_from_common_commit
``````````

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``````````diff
diff --git a/llvm/unittests/ExecutionEngine/Orc/ReOptimizeLayerTest.cpp b/llvm/unittests/ExecutionEngine/Orc/ReOptimizeLayerTest.cpp
index 176148270..571eb5e31 100644
--- a/llvm/unittests/ExecutionEngine/Orc/ReOptimizeLayerTest.cpp
+++ b/llvm/unittests/ExecutionEngine/Orc/ReOptimizeLayerTest.cpp
@@ -34,7 +34,6 @@ public:
   }
 
 protected:
-
   void SetUp() override {
     DebugFlag = true;
 
@@ -107,9 +106,7 @@ protected:
                                                     std::move(CompileFunction));
   }
 
-  void TearDown() override {
-    DebugFlag = OrigDebugFlag;
-  }
+  void TearDown() override { DebugFlag = OrigDebugFlag; }
 
   Error addIRModule(ResourceTrackerSP RT, ThreadSafeModule TSM) {
     assert(TSM && "Can not add null module");

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https://github.com/llvm/llvm-project/pull/163027