Revert "TEST-19-CGROUP: Skip on opensuse"

This reverts commit 60d064d3fd.

The logged test failure was because of missing memory controller in
testing cgroup. With the test fixed in previous commit, memory
attributes are delegated as expected.

Ref: #32439

test/units/TEST-19-CGROUP.sh

@@ -3,14 +3,6 @@
 set -eux
 set -o pipefail
 
-. /etc/os-release
-# FIXME: This test fails on opensuse with the following error and others:
-# Apr 25 10:24:04 H (cat)[910]: device-mapper: create ioctl on ... failed: Device or resource busy
-if [[ "$ID" =~ "opensuse" ]]; then
-    echo "Skipping due to known unexpected behaviour in OpenSUSE kernels" >>/skipped
-    exit 77
-fi
-
 # shellcheck source=test/units/test-control.sh
 . "$(dirname "$0")"/test-control.sh