chore: do not use @large on method level

[kubawerlos]

Technically, this changes nothing, as "The @large annotation is an alias for @group large", but:

@large is equivalent to PHPUnit\Framework\Attributes\Large - see sebastianbergmann/phpunit#4502:

@large will be implemented as PHPUnit\Framework\Attributes\Large (only allowed on classes; @large was allowed on methods but it does not make sense to mix tests of different sizes in a test case class)

@group large is equivalent to #[Group('large')] and this is allowed on method level: https://github.com/sebastianbergmann/phpunit/blob/11.0.2/tests/end-to-end/_files/size-groups/SizeGroupsTest.php

[coveralls]

coverage: 94.78%. remained the same
when pulling 6106311 on 6b7562617765726c6f73:do_not_use_large_on_method_level
into 0bb1e4b on PHP-CS-Fixer:master.