LU-17397：mdtest failed (Lustre became read-only) under high stress (CentOS-8.5.2111 + Lustre 2.15.3)

Check that only rhel8 kernel 4.18.0-370.el8+ has the fixed patch "ext4: fix potential htree corruption when growing large_dir directories"

And the issue reported kernel 4.18.0-348.2.1.el8_lustre.x86_64 doesn’t have the fix.

Try rhel8.9 and openEuler22.03, both Lustre Ldiskfs and ext4 can’t reproduce this issue on one client.