ansible-test: don't trigger full CI run for changes to changelogs/ and docs/ in collections (#68550)

* Don't trigger full CI run for changes to changelogs/ and docs/ in collections.

* Add changelog fragment.

* Update changelogs/fragments/68550-ansible-test-docs-changelogs.yml

Co-Authored-By: Matt Clay <matt@mystile.com>

Co-authored-by: Matt Clay <matt@mystile.com>

changelogs/fragments/68550-ansible-test-docs-changelogs.yml

@@ -0,0 +1,2 @@
+bugfixes:
+- "ansible-test change detection - Run only sanity tests on ``docs/`` and ``changelogs/`` in collections, to avoid triggering full CI runs of integration and unit tests when files in these directories change."

test/lib/ansible_test/_internal/classification.py

@@ -641,6 +641,14 @@ class PathMapper:
         if result is not None:
             return result
 
+        minimal = {}
+
+        if path.startswith('changelogs/'):
+            return minimal
+
+        if path.startswith('docs/'):
+            return minimal
+
         return None
 
     def _classify_ansible(self, path):  # type: (str) -> t.Optional[t.Dict[str, str]]