chore(CI): Adjust testing matrix for Nextcloud 30 on main #6059

Job	Run time
php8.1 on stable30 integration tests	1m 45s
php8.1 on stable30 unit tests	1m 43s
php8.1 on master integration tests	1m 45s
php8.1 on master unit tests	1m 56s
php8.2 on stable30 integration tests	1m 41s
php8.2 on stable30 unit tests	3m 51s
php8.2 on master integration tests	1m 47s
php8.2 on master unit tests	4m 16s
php8.3 on stable30 integration tests	1m 37s
php8.3 on stable30 unit tests	4m 3s
php8.3 on master integration tests	1m 39s
php8.3 on master unit tests	31s
php-test-summary	5s
	26m 39s

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