fix(modules): allow modules to be loaded in any order when using `angular-loader`

Some modules used to assume that the angular helpers would always be available when their script was
executed. This could be a problem when using `angular-loader` and the module file happened to get
loaded before the core `angular.js` file.
This commit fixes the issue by delaying the access to angular helpers, until they are guaranteed to
be available.

Affected modules:
- `ngAnimate`
- `ngMessageFormat`
- `ngMessages`
- `ngRoute`
- `ngSanitize`

Fixes #9140

Closes #14794