tests: Add bootc end-to-end validation test

Add a knob to tests/tasks/install_and_check.yml to skip the role run, as
we don't want to do this during validation.

Author: martinpitt

tests/tasks/install_and_check.yml

@@ -6,6 +6,7 @@
       include_role:
         name: linux-system-roles.postgresql
         public: true
+      when: __run_role | d(true) | bool
 
     - name: Flush handlers
       meta: flush_handlers

tests/tests_bootc_e2e.yml

@@ -0,0 +1,29 @@
+# SPDX-License-Identifier: MIT
+---
+- name: bootc end-to-end test
+  hosts: all
+  tags:
+    - tests::bootc-e2e
+  gather_facts: false
+  tasks:
+    - name: bootc image build preparation
+      when: ansible_connection == "buildah"
+      block:
+        - name: Run postgresql role
+          include_role:
+            name: linux-system-roles.postgresql
+
+        - name: Create QEMU deployment
+          delegate_to: localhost
+          command: "{{ lsr_scriptdir }}/bootc-buildah-qcow.sh {{ ansible_host }}"
+
+    - name: Validation of deployed image
+      when: ansible_connection | d("") != "buildah"
+      block:
+        - name: Test default settings
+          include_tasks: tasks/install_and_check.yml
+          vars:
+            __run_role: false
+            __test_clean_instance: false
+            __postgresql_is_booted: true
+            __test_check_version: true