Dynamic (non-explicitly declared) properties are deprecated as of PHP 8.2 and are expected to become a fatal error in PHP 9.0.
In this particular group of test files, the test classes contain a `set_up()` method which sets a few dynamic (not explicitly declared) properties.
For those properties which were set using a function call or variable access, the property has been explicitly declared on the class now.
For those properties which were set using a constant scalar expression and for which the value is not changed by any of the tests, the property setting has been removed in favor of declaring a class constant.
Includes removing one unused dynamic property declaration: `$this->queries` in `Test_Block_Supports_Layout`, which appears to be a copy/paste from `Tests_Theme_wpThemeJsonResolver`.
Follow-up to [40/tests], [260/tests], [598/tests], [50960], [52675], [53085], [53557], [53558], [53850], [53851], [53852], [53853], [53854], [53856].
Props jrf.
See #56033.
git-svn-id: https://develop.svn.wordpress.org/trunk@53916 602fd350-edb4-49c9-b593-d223f7449a82