Fuzz tampered tests for `ERC2771Forwarder`

[cairoeth]

Fixes #4896 and helps #4894

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• [ ] Tests
• [ ] Documentation
• [ ] Changeset entry (run npx changeset add)

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[cairoeth]

@Amxx those two functions are a bit different as they test for two different cases:

• testExecuteBatchTamperedValuesZeroReceiver: if the receiver is the zero address, then the call will revert if any of the meta transactions are invalid/tampered
• testExecuteBatchTamperedValues: if the receiver is not the zero address, then the call will not revert but the tampered meta transaction will simply just be skipped.

To get the latest version and be able to run the tests, do foundryup on terminal.

[Amxx]

@cairoeth I rewrote the test quite heavily. IMO that is more readable. Let me know what you think.

[cairoeth]

looks great, thanks!