Runner image ubuntu24/20260726.254 updated podman from 4.9.3 to 5.8.4
which is installed from the podman-static bundle. This bundle ships a
non-setuid fusermount3 in /usr/local/bin which shadows the setuid
/usr/bin/fusermount3 from the fuse3 package (as /usr/local/bin comes
first in PATH). A non-setuid fusermount3 cannot mount as an
unprivileged user, so the cmd/mount and cmd/mount2 tests failed with:
fusermount3: mount failed: Operation not permitted
Fix by removing the podman bundled fusermount binaries so the distro
provided setuid one is used.