[8.x] Deprecate old collection and macroable objects

[driesvints]

We should definitely keep the objects around for a couple of major versions but we should push people to use the newer classes so we can eventually get rid of the duplicate ones.

[crynobone]

I find it odd that Illuminate\Collections\Enumerable and Illuminate\Collections\EnumerableValues contract extends Illuminate\Contracts\Support\Arrayable and Illuminate\Contracts\Support\Jsonable.

Would it make send to explicitly have this been used by Illuminate\Support\Collection and Illuminate\Support\LazyCollection and keep them for framework usage.

[driesvints]

@crynobone agreed. I'll send in a pr.

[driesvints]

@crynobone actually, I meant that I think it's also odd that the contract extends from these but I feel like the collection classes themselves can definitely keep them.

[driesvints]

@crynobone #32506