[11.x] Fix `withoutOverlapping` for grouped scheduled closures #42601

Job	Run time
PHP 8.2 - PHPUnit 10.5 - prefer-lowest - Windows	2m 17s
PHP 8.2 - PHPUnit 10.5 - prefer-stable - Windows	2m 17s
PHP 8.2 - PHPUnit 10.5.12 - prefer-lowest	2m 7s
PHP 8.2 - PHPUnit 11.0.1 - prefer-lowest - Windows	2m 16s
PHP 8.2 - PHPUnit 10.5.12 - prefer-stable	2m 7s
PHP 8.2 - PHPUnit 11.0.1 - prefer-stable - Windows	2m 42s
PHP 8.2 - PHPUnit 11.3.2 - prefer-lowest	1m 55s
PHP 8.3 - PHPUnit 10.5 - prefer-lowest - Windows	2m 30s
PHP 8.2 - PHPUnit 11.3.2 - prefer-stable	2m 7s
PHP 8.3 - PHPUnit 10.5 - prefer-stable - Windows	2m 23s
PHP 8.3 - PHPUnit 10.5.12 - prefer-lowest	2m 4s
PHP 8.3 - PHPUnit 11.0.1 - prefer-lowest - Windows	2m 23s
PHP 8.3 - PHPUnit 10.5.12 - prefer-stable	3m 8s
PHP 8.3 - PHPUnit 11.0.1 - prefer-stable - Windows	2m 28s
PHP 8.3 - PHPUnit 11.3.2 - prefer-lowest	1m 57s
PHP 8.3 - PHPUnit 11.3.2 - prefer-stable	1m 55s
PHP 8.4 - PHPUnit 10.5 - prefer-stable - Windows	2m 24s
PHP 8.4 - PHPUnit 11.0.1 - prefer-stable - Windows	4m 4s
PHP 8.4 - PHPUnit 10.5.12 - prefer-lowest	3m 57s
PHP 8.4 - PHPUnit 10.5.12 - prefer-stable	3m 11s
PHP 8.4 - PHPUnit 11.3.2 - prefer-lowest	2m 52s
PHP 8.4 - PHPUnit 11.3.2 - prefer-stable	3m 37s
	56m 41s

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