tests: Replace deprecated PHPUnit assertObject(Not)HasAttribute (#3…

…3268)

PHPUnit 10 at first removed this but then in 10.1 re-added it as
`assertObject(Not)HasProperty`. Now that a replacement exists,
yoast/phpunit-polyfills provides a polyfill, so let's make use of it.

Note WordPress's `WP_UnitTestCase` and WorDBless's
`WorDBless\BaseTestCase` both already include all Yoast polyfill traits,
so explicit use of the trait is only needed for things using PHPUnit's
base class.

Committed via a GitHub action: https://github.com/Automattic/jetpack/actions/runs/6302853196

composer.json

@@ -4,7 +4,7 @@
 	"license": "GPL-2.0-or-later",
 	"require": {},
 	"require-dev": {
-		"automattic/jetpack-changelogger": "^3.3.9"
+		"automattic/jetpack-changelogger": "^3.3.10-alpha"
 	},
 	"scripts": {
 		"test-js": [