[9.x] Arr::map - Fix map-by-reference w/ built-ins

[claudiodekker]

This PR fixes fallback support for map by-reference with built-in's such as strrev that do not accept more than one argument, making it slightly more flexible, predictable and forgiving in behavior, as in the majority of situations the $key argument is omitted/ignored by the developer anyway.

While some situations might remain unsolved for some built-ins (ones that have exactly 2 parameters), I think it's important to mention that in such situations the user would be better off with a different or lower-level method such as array_map instead, as Laravel's documentation clearly indicates that a $key arg is passed within the map method.

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ArgumentCountError: strrev() expects exactly 1 argument, 2 given in [..]/Illuminate/Collections/Arr.php:558
Stack trace:
#0 [internal function]: strrev('usb', 0)

Closes #42789