Add PYTHONWARNINGS=ignore option to silence deprecation warnings

changelog/64660.added.md

@@ -0,0 +1 @@
+Added ability to use PYTHONWARNINGS=ignore to silence deprecation warnings.

doc/topics/development/deprecations.rst

@@ -55,3 +55,10 @@ Development begins on ``Aluminium``, or ``v3003``, after the ``v3002`` tag is
 applied to the ``master`` branch.  Once this occurs, all uses of the
 ``warn_until`` function targeting ``Aluminium``, along with the code they are
 warning about should be removed from the code.
+
+
+Silence Deprecation Warnings
+----------------------------
+
+If you set the `PYTHONWARNINGS` environment variable to `ignore` Salt will
+not print the deprecation warnings.

salt/utils/versions.py

@@ -12,6 +12,7 @@ import datetime
 import inspect
 import logging
 import numbers
+import os
 import sys
 import warnings
 
@@ -183,7 +184,7 @@ def warn_until(
             ),
         )
 
-    if _dont_call_warnings is False:
+    if _dont_call_warnings is False and os.environ.get("PYTHONWARNINGS") != "ignore":
         warnings.warn(
             message.format(version=version.formatted_version),
             category,
@@ -252,7 +253,7 @@ def warn_until_date(
             ),
         )
 
-    if _dont_call_warnings is False:
+    if _dont_call_warnings is False and os.environ.get("PYTHONWARNINGS") != "ignore":
         warnings.warn(
             message.format(date=date.isoformat(), today=today.isoformat()),
             category,

tests/pytests/functional/modules/test_test.py

@@ -0,0 +1,9 @@
+def test_deprecation_warnings_ignore(salt_call_cli):
+    """
+    Test to ensure when env variable PYTHONWARNINGS=ignore
+    is set that we do not add warning to output.
+    """
+    ret = salt_call_cli.run(
+        "--local", "test.deprecation_warning", env={"PYTHONWARNINGS": "ignore"}
+    )
+    assert "DeprecationWarning" not in ret.stderr