fix($cookies): remove the deprecated $cookieStore factory

Closes #16465

BREAKING CHANGE:

The $cookieStore has been removed. Migrate to the $cookies service. Note that
for object values you need to use the `putObject` & `getObject` methods as
`get`/`put` will not correctly save/retrieve them.

Before:
```js
$cookieStore.put('name', {key: 'value'});
$cookieStore.get('name'); // {key: 'value'}
$cookieStore.remove('name');
```

After:
```js
$cookies.putObject('name', {key: 'value'});
$cookies.getObject('name'); // {key: 'value'}
$cookies.remove('name');
```