[VarExporter] Fix exporting classes with __unserialize() but not __serialize()#48724

nicolas-grekas merged 1 commit intosymfony:5.4symfony/symfony:5.4from

fancyweb:var-exporter/fix-export-__unserialize-without-__serializefancyweb/symfony:var-exporter/fix-export-__unserialize-without-__serializeCopy head branch name to clipboard