Move overlayfs test into include helper and wrap in overlayfs_kernel

By making the test a file to be included as a helper, we can reuse most of the code for a fuse_overlayfs test without copy-pasting

Signed-off-by: Ryan Lee <ryan.lee@canonical.com>

tests/regression/apparmor/Makefile

@@ -279,7 +279,7 @@ TESTS=aa_exec \
       named_pipe \
       namespaces \
       net_raw \
-      overlayfs \
+      overlayfs_kernel \
       open \
       openat \
       pipe \

tests/regression/apparmor/overlayfs_kernel.sh

@@ -0,0 +1,14 @@
+#! /bin/bash
+#	Copyright (C) 2024 Canonical, Ltd.
+#
+#	This program is free software; you can redistribute it and/or
+#	modify it under the terms of the GNU General Public License as
+#	published by the Free Software Foundation, version 2 of the
+#	License.
+
+#=NAME overlayfs_kernel
+#=DESCRIPTION
+# Verifies that file rules work in a (kernel) overlayfs
+#=END
+
+source "./overlayfs_common.inc"

tests/regression/apparmor/task.yaml

@@ -47,7 +47,7 @@ environment:
     TEST/onexec: 1
     TEST/open: 1
     TEST/openat: 1
-    TEST/overlayfs: 1
+    TEST/overlayfs_kernel: 1
     TEST/pipe: 1
     TEST/pivot_root: 1
     TEST/posix_ipc: 1