[4.2] Finder: Enforce Taxonomies to contain a title

[Hackwar]

Pull Request for Issue #35977.

Summary of Changes

If a finder plugin tries to add an empty taxonomy, this can fail with the error message from #35977. This PR should fix that. This most likely is an article with a non-existing author or something similar.

Testing Instructions

Unfortunately I can't replicate the issue from #35977 and the below testing instructions seem to not be able to replicate the problem. Maybe @Stuartemk can investigate this further and try to test this?

1. Create a user.
2. Create an article and set the author of the article to the previously created user.
3. Delete the user.
4. Clear your search index and rebuild it.

Actual result BEFORE applying this Pull Request

It fails with the above error message (An Error Has Occurred Category must have a title.)

Expected result AFTER applying this Pull Request

Everything is properly indexed.

[brianteeman]

Followed test instructions and was unable to replicate the reported problem

[joomla-bot]

This pull requests has been automatically converted to the PSR-12 coding standard.

[danpdanp]

I have tested this item :white_check_mark: successfully on 28dc8cc006f9cc792fe17428d980c8080ab486b5

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[RickR2H]

I was not able to reproduce the issue. We need better guidance to reproduce the issue...

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[Fedik]

From code review it looks like a valid fix. The error comes from table class https://github.com/joomla/joomla-cms/blob/f520c98c64efb538e70e918acffb60d07e4d6b1e/administrator/components/com_finder/src/Table/MapTable.php#L63-L65

The taxonomy title requirement was introduced in #21327 I suspect User may have some custom finder plugin, that not adapted it.

[Fedik]

I have tested this item :white_check_mark: successfully on 7050d69b169f83c5921d30a003f2d630515515f4

On review looks valid, everything still works, I count it as success :)

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[RickR2H]

I have tested this item :white_check_mark: successfully on 7050d69b169f83c5921d30a003f2d630515515f4

Even when I could not reproduce the issue, it also doesn't break things. I tested all the search options and everything seems to be okay. That's a good test IMHO.

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[RickR2H]

RTC

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[laoneo]

Thanks!