[llvm] Move a lot of symbol code to use the symbol string pool (PR #115796)

[Lang Hames via llvm-commits]

================
@@ -1004,22 +1012,23 @@ class LinkGraph {
 
   using GetEdgeKindNameFunction = const char *(*)(Edge::Kind);
 
-  LinkGraph(std::string Name, const Triple &TT, SubtargetFeatures Features,
-            unsigned PointerSize, llvm::endianness Endianness,
+  LinkGraph(std::string Name, std::shared_ptr<orc::SymbolStringPool> SSP,
+            const Triple &TT, SubtargetFeatures Features, unsigned PointerSize,
+            llvm::endianness Endianness,
             GetEdgeKindNameFunction GetEdgeKindName)
-      : Name(std::move(Name)), TT(TT), Features(std::move(Features)),
+      : Name(std::move(Name)), SSP(SSP), TT(TT), Features(std::move(Features)),
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lhames wrote:

```c++
SSP(std::move(SSP))
```

https://github.com/llvm/llvm-project/pull/115796