Rename Tap#reverse_cask_renames to Tap#cask_reverse_renames.

[reitermarkus]

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Extracted from #16730 for easier review.

[MikeMcQuaid]

Can you explain why you think this name is better? They seem to be essentially the same to me.

[reitermarkus]

To be in line with formula_reverse_renames.

[MikeMcQuaid]

Gotcha, rename definitely makes sense in that context, thanks!