[4.2] Replace Factory::getUser() with $this->getCurrentUser() in components view class

[joomdonation]

Pull Request for Issue # .

Summary of Changes

With #37498 being merged into 4.2, we can now replace deprecated method Factory::getUser() in components view classes with new method $this->getCurrentUser()

Testing Instructions

1. Use Joomla 4.2 nightly build
2. Apply patch
3. Access to random pages (frontend, backend), make sure nothing is broken.

[viocassel]

I have tested this item ✅ successfully on e6b89a7

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[toivo]

I have tested this item ✅ successfully on e6b89a7

Tested successfully in Joomla 4.2.0-beta1-dev of 9 June

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[alikon]

RTC

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[laoneo]

Thanks!