adding quiet option to assert (ansible#27124) (#52032)

* adding quiet option to assert (ansible#27124)

* adding doc for quiet to assert.py

* fixing PEP8 failure

* improving example

* improving docs

* adding changelog fragment

* adding . at end of descriptions

* removing trailing blank line

* adding integration test for assert

* fixing CI complaints

* disabling gather_facts in quiet.yml test

* rerunning to capture skip

* cleaning up python 2 vs 3

* following rebase

* fixing CI complaints

* fixing CI complaints

* fixing CI complaints

* fixing CI complaints

* fixing CI complaints

test/integration/targets/assert/quiet.yml

@@ -0,0 +1,16 @@
+---
+- hosts: localhost
+  gather_facts: False
+  vars:
+    item_A: yes
+  tasks:
+  - assert:
+      that: "{{ item }} is defined"
+      quiet: True
+    with_items:
+      - item_A
+  - assert:
+      that: "{{ item }} is defined"
+      quiet: False
+    with_items:
+      - item_A