Tests

Remove reliance on the `CloudMessage` class when handling messages #1180

Job	Run time
Backward Compatibility Check	41s
PHP 8.1, lowest deps	34s
PHP 8.1, highest deps	35s
PHP 8.2, lowest deps	39s
PHP 8.2, highest deps	49s
PHP 8.3, lowest deps	46s
PHP 8.3, highest deps	38s
PHP 8.4, highest deps	44s
	5m 26s

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