Fix the data dynamic property in WP_Term

[anton-vlasenko]

This PR aims to solve the issue with the WP_Term::$data dynamic property.
The WP_Term class employs the __get magic method to compute the object data.
However, since PHP 8.2 does not support dynamic properties, it is better to eliminate this approach.

Trac ticket: https://core.trac.wordpress.org/ticket/58087

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[anton-vlasenko]

Thank you for the code review, @mukeshpanchal27.
I have resolved the merge conflict and addressed the feedback from the code review.
The PR is now ready for consideration.

[anton-vlasenko]

I'm closing this PR as the solution needs more refinement.

[hellofromtonya]

Reopening this PR as IMO it's the most simplistic approach to resolve the issue and goals (see my reasonings here).

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Props antonvlasenko, hellofromtonya, mukesh27.

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[github-actions]

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[hellofromtonya]

Reclosing this PR. Why? Discovered today that Core adds/uses a lot of dynamic properties for WP_Term. Thus, it no longer makes sense to only deal with the data property. A broader solution will be needed for all of the dynamic properties.