CRI-O: Install libseccomp2 from backports on Debian 10 (#7816)

* CRI-O: Install libseccomp2 from backports on Debian 10

libseccomp2 is a required dependency of cri-o-runc package

The one provided in Debian 10 repositories is outdated

* 7816: Remove useless when condition

As this condition is handled by block

roles/container-engine/cri-o/tasks/main.yaml

@@ -87,6 +87,13 @@
     - not skip_downloads|default(false)
     - download_run_once
 
+- name: Add libseccomp2 package from Debian Backports to install
+  set_fact:
+    crio_packages: "{{ crio_debian_buster_backports_packages + crio_packages }}"
+  when:
+    - ansible_distribution == "Debian"
+    - ansible_distribution_version == "10"
+
 - name: Install cri-o packages
   package:
     name: "{{ item }}"