[llvm] [NFC] Change FindDbgDeclareUsers interface to match findDbgUsers/values (PR #73498)

[Felipe de Azevedo Piovezan via llvm-commits]

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@@ -40,7 +40,7 @@ class Module;
 
 /// Finds dbg.declare intrinsics declaring local variables as living in the
 /// memory that 'V' points to.
-TinyPtrVector<DbgDeclareInst *> FindDbgDeclareUses(Value *V);
+void findDbgDeclares(SmallVectorImpl<DbgDeclareInst *> &DbgUsers, Value *V);
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felipepiovezan wrote:

Out parameters also encourage non-constness of variables

https://github.com/llvm/llvm-project/pull/73498