Add option to enable/disable animation of Collapse on a per-show/hide basis

Created by: wnr

See #15747 (closed) for the original feature request.

What we want: An additional JavaScript option of $(e).collapse() that let us disable the animation.

My proposal is that such option would be named animate, and has a default value of true.

Example usage:

// Collapses the element without any animation.
$(element).collapse({
  toggle: true,
  animate: false
});

// Collapses the element with animation, as animate is true per default.
$(element).collapse({
  toggle: true
});

There are probably other Bootstrap APIs that could also benefit by having such option.

If this sounds good, I could look into creating a PR.