[6.0] Fix language auto-loading without Application in CMSPlugin

[Fedik]

Pull Request for Issue # .

Summary of Changes

Fix language auto-loading when plugin does not provide Application.

Testing Instructions

Apply patch.
Create a Task for "Global Check-in"

Actual result BEFORE applying this Pull Request

The plugin is untranslated

Expected result AFTER applying this Pull Request

The plugin is translated

Link to documentations

Please select:

• Documentation link for docs.joomla.org:
• No documentation changes for docs.joomla.org needed
• Pull Request link for manual.joomla.org:
• No documentation changes for manual.joomla.org needed

Reference:

• [6.0] Fix language autoload in CMSPlugin constructor to work safely #40355

[tecpromotion]

I have tested this item ✅ successfully on 0aed622

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Actual result BEFORE applying this Pull Request

Result AFTER applying this Pull Request

[joomdonation]

I have tested this item ✅ successfully on 751c624

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[joomdonation]

I have not tested this item.

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[tecpromotion]

I have tested this item ✅ successfully on 4fa12c2

I get an error message with the patch tester.

The file marked for modification does not exist: phpstan-baseline.neon

Replace CMSPlugin.php manually with https://github.com/joomla/joomla-cms/blob/4fa12c225a655042c6f2218e6486a5944b2a7ec4/libraries/src/Plugin/CMSPlugin.php

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[Fedik]

One more test please, when all test passes, thanks :)

[exlemor]

I have tested this item ✅ successfully on 99fc571

I have tested this successfully via the Download package. Thanks @Fedik!

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[joomdonation]

RTC. Thanks

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[richard67]

I've allowed myself to fix the conflict in the phpstan-baseline.neon file. As this did not change anything on the code, RTC is still valid.

[softforge]

Thank you, @Fedik, for your work on fixing the bug, and @richard67 for fixing the conflict. Excellent work. And of course the testers for your part in the process.