[VPlan] Disable partial reductions again with EVL tail folding (#167863) VPPartialReductionRecipe doesn't yet support an EVL variant, and we guard against this by not calling convertToAbstractRecipes when we're tail folding with EVL. However recently some things got shuffled around which means we may detect some scaled reductions in collectScaledReductions and store them in ScaledReductionMap, where outside of convertToAbstractRecipes we may look them up and start e.g. adding a scale factor to an otherwise regular VPReductionPHI. This fixes it by skipping collectScaledReductions, and fixes #167861
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