bug#32628: 26; Rename `window-setup-hook'

[Juri Linkov]

> The doc string even admits that this name is bad:
>
>   (The name of this hook is due to historical reasons, and does not
>    reflect its purpose very well.)
>
> Why not rename it now, and deprecate the old name, aliasing it to the
> new name?
>
> What should the new name be?  Maybe something like
> `after-set-frame-parameters-startup-hook'?

This is the clear winner of the contest for the longest hook name.