CLSA-2023-1697740947 glib2: Fix of 5 CVEs

Enable internal tests - Skip several failed tests from the check - CVE-2023-29499: Fix GVariant offset table entry size which is not checked in isnormal - CVE-2023-32611: Fix an issue where gvariantbyteswap can take a long time with some non-normal inputs - CVE-2023-32665: Fix GVariant...