Move isOffsetAccessLegal to MaybeOffsetAccessibleTypeTrait#4205

ondrejmirtes merged 1 commit intophpstan:2.1.xphpstan/phpstan-src:2.1.xfrom

VincentLanglet:refactorOffsetLegalVincentLanglet/phpstan-src:refactorOffsetLegalCopy head branch name to clipboard