[stable31] feat(settings): simplify OPcache checks #20278

Job	Run time
changes	8s
php8.1-webdav	1m 41s
php8.2-webdav	1m 46s
php8.3-webdav	1m 28s
php8.4-webdav	1m 40s
files-external-webdav-summary	6s
	6m 49s

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