fix($animate): let cancel() reject the runner promise

Closes #14204
Closes #16373

BREAKING CHANGE:

$animate.cancel(runner) now rejects the underlying
promise and calls the catch() handler on the runner
returned by $animate functions (enter, leave, move,
addClass, removeClass, setClass, animate).
Previously it would resolve the promise as if the animation
had ended successfully.

Example:

```js
var runner = $animate.addClass('red');
runner.then(function() { console.log('success')});
runner.catch(function() { console.log('cancelled')});

runner.cancel();
```

Pre-1.7.0, this logs 'success', 1.7.0 and later it logs 'cancelled'.
To migrate, add a catch() handler to your animation runners.