Convert mod_articles_popular to new structure

[carlitorweb]

Summary of Changes

This PR converts mod_articles_popular to the new structure

Testing Instructions

• Use Joomla 4.3
• Create an instance of the module Articles - Most Read. Note how it works.
• Apply patch
• Delete administrator/cache/autoload_psr4.php
• Refresh the page, make sure the module still displays the same as before.

[carlitorweb]

@chmst I using the wrong branch?

[chmst]

@carlitorweb my apologies, was not intended to remove the label.

[chmst]

I have tested this item ✅ successfully on 130e77b

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[viocassel]

I have tested this item ✅ successfully on 130e77b

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_{This comment was created with the J!Tracker Application at issues.joomla.org/tracker/joomla-cms/39539.}

[Quy]

RTC

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_{This comment was created with the J!Tracker Application at issues.joomla.org/tracker/joomla-cms/39539.}

[laoneo]

I would like to avoid static functions, so I made some suggestions. Can you please review them @carlitorweb ?

[carlitorweb]

@laoneo understood. I will change it for other PRs too.

[laoneo]

Can we get here just one more test to ensure the recent cosmetic changes are correct?

[HLeithner]

thanks