[llvm] [SandboxIR][NFC] GenericSetter tracker class (PR #102260)

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@@ -687,7 +689,10 @@ void LoadInst::dump() const {
 void StoreInst::setVolatile(bool V) {
   auto &Tracker = Ctx.getTracker();
   if (Tracker.isTracking())
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vporpo wrote:

Hmm I am not sure I follow how this could be done. Could you elaborate?

Perhaps we could move the `isTracking()` check inside `track()` and have it create the object internally instead of having to create the object with `make_unique` and passing it as an argument. 

https://github.com/llvm/llvm-project/pull/102260