[6.2] Remove cache deprecated code in ApplicationModel

[joomdonation]

Pull Request resolves # .

• I read the Generative AI policy and my contribution is either not created with the help of AI or is compatible with the policy and GNU/GPL 2 or later.

Summary of Changes

Currently, ApplicationModel class still uses the deprecated method Factory::getCache() to create cache. This PR update that code to use cache controller factory to create cache instead.

Testing Instructions

• Use Joomla 6.2
• Go to System -> Global Configuration, System tab, set System Cache to one of the two ON options
• Access to System -> Maintenance -> Clear Cache, you will see different cache groups displayed
• Go back to System -> Global Configuration, set System Cache to Off
• Access to Access to System -> Maintenance -> Clear Cache again, make sure all cache groups except language are deleted/removed

Actual result BEFORE applying this Pull Request

• Works, but uses deprecated code

Expected result AFTER applying this Pull Request

• Works, without using deprecated code

Link to documentations

Please select:

• Documentation link for guide.joomla.org:

• No documentation changes for guide.joomla.org needed

• Pull Request link for manual.joomla.org:

• No documentation changes for manual.joomla.org needed

[laoneo]

Thanks!