[llvm] [CycleInfo] Add missing exports to symbols used in tests (PR #225737)

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``````````bash
git-clang-format --diff origin/main HEAD --extensions cpp -- llvm/lib/CodeGen/MachineCycleAnalysis.cpp llvm/lib/IR/CycleInfo.cpp --diff_from_common_commit
``````````

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View the diff from clang-format here.
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``````````diff
diff --git a/llvm/lib/CodeGen/MachineCycleAnalysis.cpp b/llvm/lib/CodeGen/MachineCycleAnalysis.cpp
index e1b7401fa..ba1766b97 100644
--- a/llvm/lib/CodeGen/MachineCycleAnalysis.cpp
+++ b/llvm/lib/CodeGen/MachineCycleAnalysis.cpp
@@ -16,7 +16,8 @@
 
 using namespace llvm;
 
-template class LLVM_ABI_FOR_TEST llvm::GenericCycleInfo<llvm::MachineSSAContext>;
+template class LLVM_ABI_FOR_TEST
+    llvm::GenericCycleInfo<llvm::MachineSSAContext>;
 
 char MachineCycleInfoWrapperPass::ID = 0;
 

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https://github.com/llvm/llvm-project/pull/225737