testing/php7: security upgrade to 7.4.32
- CVE-2022-31628
- CVE-2022-31629
ref https://github.com/php/php-src/blob/613fcb5251f2b8742bf03f43fc9a8429963db927/NEWS#L3-L9
ref https://github.com/php/php-src/blob/613fcb5251f2b8742bf03f43fc9a8429963db927/NEWS#L3-L9