[stable-8] Add default_without_diff callback (#7949) (#7968)

Add default_without_diff callback (#7949)

* Add default_without_diff callback.

* Add examples and BOTMETA entry.

(cherry picked from commit 980fa36fac)

tests/integration/targets/callback_default_without_diff/aliases

@@ -0,0 +1,6 @@
+# Copyright (c) Ansible Project
+# GNU General Public License v3.0+ (see LICENSES/GPL-3.0-or-later.txt or https://www.gnu.org/licenses/gpl-3.0.txt)
+# SPDX-License-Identifier: GPL-3.0-or-later
+
+azp/posix/3
+needs/target/callback

tests/integration/targets/callback_default_without_diff/tasks/main.yml

@@ -0,0 +1,65 @@
+---
+####################################################################
+# WARNING: These are designed specifically for Ansible tests       #
+# and should not be used as examples of how to write Ansible roles #
+####################################################################
+
+# Copyright (c) Ansible Project
+# GNU General Public License v3.0+ (see LICENSES/GPL-3.0-or-later.txt or https://www.gnu.org/licenses/gpl-3.0.txt)
+# SPDX-License-Identifier: GPL-3.0-or-later
+
+- block:
+    - name: Create temporary file
+      tempfile:
+      register: tempfile
+
+    - name: Run tests
+      include_role:
+        name: callback
+      vars:
+        tests:
+          - name: Basic file diff
+            environment:
+              ANSIBLE_NOCOLOR: 'true'
+              ANSIBLE_FORCE_COLOR: 'false'
+              ANSIBLE_DIFF_ALWAYS: 'true'
+              ANSIBLE_PYTHON_INTERPRETER: "{{ ansible_python_interpreter }}"
+              ANSIBLE_STDOUT_CALLBACK: community.general.default_without_diff
+            playbook: |
+              - hosts: testhost
+                gather_facts: true
+                tasks:
+                  - name: Create file
+                    copy:
+                      dest: "{{ tempfile.path }}"
+                      content: |
+                        Foo bar
+
+                  - name: Modify file
+                    copy:
+                      dest: "{{ tempfile.path }}"
+                      content: |
+                        Foo bar
+                        Bar baz bam!
+            expected_output: [
+              "",
+              "PLAY [testhost] ****************************************************************",
+              "",
+              "TASK [Gathering Facts] *********************************************************",
+              "ok: [testhost]",
+              "",
+              "TASK [Create file] *************************************************************",
+              "changed: [testhost]",
+              "",
+              "TASK [Modify file] *************************************************************",
+              "changed: [testhost]",
+              "",
+              "PLAY RECAP *********************************************************************",
+              "testhost                   : ok=3    changed=2    unreachable=0    failed=0    skipped=0    rescued=0    ignored=0   ",
+            ]
+
+  always:
+    - name: Clean up temp file
+      file:
+        path: "{{ tempfile.path }}"
+        state: absent