Fix x-model checkbox weirdness

[austenc]

Seems like x-model should also use the skipForClone function. Normally extra listeners wouldn't cause a problem, but if you're binding to an array (for example, with multiple checkboxes) it causes incorrect values to be bound. Each value is doubled after a clone happens.

This was discovered while investigating livewire/livewire#5454

I've included a test for this that fails prior to skipForClone being added.

[calebporzio]

I'm going to close this because I feel iffy about wrapping the entirety of x-model in skipDuringClone.

As it's the event listeners we don't want registered and not the "binding of values" that also happens.

I'm closing for now because I'm trying to keep these repos clean and not in a wip state, but I'm super grateful and feel free to re-open with a different approach (maybe just wrapping the event listening in the skip function?)

Thanks!