[llvm] [IR] Add getDataLayout() helpers to BasicBlock and Instruction (PR #96902)

[Yingwei Zheng via llvm-commits]

================
@@ -459,7 +459,7 @@ class LoadEliminationForLoop {
 
     Type *LoadType = Initial->getType();
     Type *StoreType = Cand.Store->getValueOperand()->getType();
-    auto &DL = Cand.Load->getParent()->getModule()->getDataLayout();
+    auto &DL = Cand.Load->getParent()->getDataLayout();
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dtcxzyw wrote:

```suggestion
    auto &DL = Cand.Load->getDataLayout();
```

https://github.com/llvm/llvm-project/pull/96902