Bug#1006529: Bug#1030630: mariadb: FTBFS on multiple archs: main.func_json_notembedded very long output and crash, anon_inode:io_uring warning

[Otto Kekäläinen]

Closing also the sparc64 issue about main.func_json_notembedded on the
same grounds as I closed the hppa issue in Bug#1006529.

Upstream https://jira.mariadb.org/browse/MDEV-30518 remains open,
which is for s390x, but likely the same root cause.