[llvm] [MachineScheduler][NFCI] Add Offset and OffsetIsScalable args to shouldClusterMemOps (PR #73778)

[Francesco Petrogalli via llvm-commits]

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@@ -1496,12 +1496,18 @@ class TargetInstrInfo : public MCInstrInfo {
   /// to TargetPassConfig::createMachineScheduler() to have an effect.
   ///
   /// \p BaseOps1 and \p BaseOps2 are memory operands of two memory operations.
+  /// \p Offset1 and \p Offset2 are the byte offsets for the memory
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fpetrogalli wrote:

Oh right - we do not have an abstraction for negative scalable values. It would be ideal though, I can see `OffsetInBytes` derived from `FixedOrScalableQuantity` being useful in other places. I won't hold your work here - please go ahead with your code, we can fix it later if needed.

https://github.com/llvm/llvm-project/pull/73778