Disable jinja2_native warning in CI (#75214)

changelogs/fragments/jinja2_native-warning-config-toggle.yml

@@ -0,0 +1,2 @@
+minor_changes:
+  - Introduce a config option to enable/disable emitting warning about Jinja2 version being old for ``jinja2_native``. The option is on by default, only in CI it is off.

lib/ansible/config/base.yml

@@ -1632,6 +1632,15 @@ MAX_FILE_SIZE_FOR_DIFF:
   ini:
   - {key: max_diff_size, section: defaults}
   type: int
+JINJA2_NATIVE_WARNING:
+  name: Running older than required Jinja version for jinja2_native warning
+  default: True
+  description: Toggle to control showing warnings related to running a Jinja version
+               older than required for jinja2_native
+  env: [{name: ANSIBLE_JINJA2_NATIVE_WARNING}]
+  ini:
+  - {key: jinja2_native_warning, section: defaults}
+  type: boolean
 NETWORK_GROUP_MODULES:
   name: Network module families
   default: [eos, nxos, ios, iosxr, junos, enos, ce, vyos, sros, dellos9, dellos10, dellos6, asa, aruba, aireos, bigip, ironware, onyx, netconf, exos, voss, slxos]

lib/ansible/template/__init__.py

@@ -95,10 +95,11 @@ if C.DEFAULT_JINJA2_NATIVE:
     except ImportError:
         from jinja2 import Environment
         from jinja2.utils import concat as j2_concat
-        display.warning(
-            'jinja2_native requires Jinja 2.10 and above. '
-            'Version detected: %s. Falling back to default.' % j2_version
-        )
+        if C.JINJA2_NATIVE_WARNING:
+            display.warning(
+                'jinja2_native requires Jinja 2.10 and above. '
+                'Version detected: %s. Falling back to default.' % j2_version
+            )
 
 
 JINJA2_BEGIN_TOKENS = frozenset(('variable_begin', 'block_begin', 'comment_begin', 'raw_begin'))

test/lib/ansible_test/_internal/ansible_util.py

@@ -81,6 +81,7 @@ def ansible_environment(args, color=True, ansible_config=None):
         ANSIBLE_LIBRARY='/dev/null',
         ANSIBLE_DEVEL_WARNING='false',  # Don't show warnings that CI is running devel
         ANSIBLE_CONTROLLER_PYTHON_WARNING='false',  # Don't show warnings in CI for old controller Python
+        ANSIBLE_JINJA2_NATIVE_WARNING='false',  # Don't show warnings in CI for old Jinja for native
         PYTHONPATH=get_ansible_python_path(args),
         PAGER='/bin/cat',
         PATH=path,