[2.15] Trim `selinux_policytype` @ integration tests (#84140)

The shell command sometimes prints a trailing whitespace which breaks
the tests on old RHELs. This patch is supposed to fix that.

(cherry picked from commit cd74c4bcd5)

test/integration/targets/module_utils_facts.system.selinux/tasks/main.yml

@@ -22,7 +22,7 @@
   register: r
 
 - set_fact:
-    selinux_policytype: "{{ r.stdout_lines[0] }}"
+    selinux_policytype: "{{ r.stdout_lines[0] | trim }}"
   when: r is success and r.stdout_lines
 
 - assert: