[llvm] [SandboxIR] Switch more Instruction::create() functions to InsertPosition (PR #111075)

[Jorge Gorbe Moya via llvm-commits]

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@@ -2891,7 +2891,8 @@ define void @foo(i1 %cond0, i1 %cond2) {
 
   {
     // Check unconditional BranchInst::create() InsertBefore.
-    auto *Br = sandboxir::BranchInst::create(BB1, /*InsertBefore=*/Ret1, Ctx);
+    auto *Br = sandboxir::BranchInst::create(
+        BB1, /*InsertBefore=*/Ret1->getIterator(), Ctx);
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slackito wrote:

The `/*InsertBefore=*/` comment should now be `/*InsertPosition=*/`, right? Same for other occurrences in this PR.

https://github.com/llvm/llvm-project/pull/111075