Debian: add containerd-config to debian_pkg_dirs

Add containerd-config package to be built.

Test:

PASS: built image successfully - std and rt
PASS: Installed image successfully (with containerd-config) - std and rt
PASS: bootstrap and unlock successfully - std and rt

Story: 2009256
Task: 45551

Signed-off-by: Thayna Santos <Thayna.EmillyCavalcanteSantos@windriver.com>
Change-Id: I575f4bed24c7c7f5e7d1ac6a45b1148b1c053aac

debian_pkg_dirs

@@ -1,5 +1,6 @@
 audit-config
 base-files-config
+containerd-config
 debian-release-config
 dhcp-config
 dnsmasq-config