feat: Rename List.reverse_perm to List.reverse_perm_self and List.reverse_perm' to List.reverse_perm_iff

[NicolaBernini]

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[github-actions]

PR summary a36c84ab82

Import changes for modified files

No significant changes to the import graph

Import changes for all files

Files	Import difference

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Declarations diff

+ reverse_perm_iff
+ reverse_perm_self
- reverse_perm'

You can run this locally as follows

## summary with just the declaration names:
./scripts/declarations_diff.sh <optional_commit>

## more verbose report:
./scripts/declarations_diff.sh long <optional_commit>

The doc-module for script/declarations_diff.sh contains some details about this script.

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No changes to technical debt.

You can run this locally as

./scripts/technical-debt-metrics.sh pr_summary

• The relative value is the weighted sum of the differences with weight given by the inverse of the current value of the statistic.
• The absolute value is the relative value divided by the total sum of the inverses of the current values (i.e. the weighted average of the differences).

[Ruben-VandeVelde]

I'm afraid this isn't what was intended - or at least only part of it. The renaming would need to be done in the lean4 repository first.

However, I'm not convinced that would be a good change anyway. Instead, I suggest two renames below that I think make more sense. Tagging @Paul-Lez who added the TODO in #22977.

If you make this change, please make sure to update the PR title.

[Ruben-VandeVelde]

This to reverse_perm_iff

[Ruben-VandeVelde]

And this to perm_reverse_iff

[Ruben-VandeVelde]

And most importantly: thanks for the contribution!

[mathlib-merge-conflicts]

This pull request has conflicts, please merge master and resolve them.