Add integration tests for include_role using variable for tasks_file (#37742)

* Add tests using a variable in tasks_from field

Related to #32503

* Do not test using hostvars with import_role

hostvars cannot be used with import_role — use include_role instead

test/integration/targets/include_import/role/test_include_role.yml

@@ -111,6 +111,18 @@
       vars:
         where_am_i_defined: "{{ test_var }}"
 
+    - name: Use a variable in tasks_from field
+      include_role:
+        name: role1
+        tasks_from: "{{ tasks_file_name }}.yml"
+      vars:
+        tasks_file_name: canary3
+
+    - name: Assert that tasks file was included
+      assert:
+        that:
+          - role1_canary3 == 'r1c3'
+
     ## FIXME This fails with the following error:
     ## The module {u'include_role': {u'name': u'role1'}} was not found in configured module paths.
     # - name: Include an entire task

test/integration/targets/include_import/roles/role1/tasks/canary3.yml

@@ -0,0 +1,2 @@
+- set_fact:
+    role1_canary3: r1c3