Check for universal argument before paste

[bet4it]

We should use (interactive "*P") in spacemacs/evil-mc-paste-before and spacemacs/evil-mc-paste-after to get the raw prefix argument.

evil-paste-before and evil-paste-after don't support plain prefix argument, so if we press SPC u p in spacemacs, we want to paste one time without indenting.
But there is already a meaning of C-u C-y in emacs, which is put point at beginning, and mark at end when yanking. So it's ambiguous when we trigger C-u C-y in spacemacs.We may want to yank with the point at beginning or just yank without indenting.
We do both of them before, which looks like a misuse. After this pull request, C-u C-y will only yank without indenting. There may be some emacs users confuse with it, but if they don't work on spacemacs-indent-sensitive-modes, they should also be confused before.
And as there is only one universal-argument in emacs, we couldn't do something like paste four times with auto indent disabled temporarily. So maybe we should find another way to temporarily disable auto indent?

By the way, as defadvice is obsolete, I replace the use of spacemacs|advise-commands with advice-add.

[duianto]

Another PR also suggests adding a universal argument to paste:
Fix pasting with universal argument #11858

How do this PR compare to that one?

[bet4it]

What has done in #11858 has already been included in this pull request.
And this pull request adds two extra changes:

1. Fix the errors related to universal argument when people enable multiple-cursors layer.
2. Rewrite spacemacs|advise-commands with advice-add, as defadvice is obsoleted.

[duianto]

Ok then we'll prefer this one over #11858

It's fine to remove the form-feed character in this instance.

[duianto]

Thank you for contributing to Spacemacs!
The PR has been cherry-picked into the develop branch, you can safely delete your branch.