build: suppress Django deprecation warnings (#29528)

Suppress them both in tests (via setup.py and pytest.ini)
and in management command & application runs
(via logsettings.py).

Developers aren't looking at these warnings; they'll be dealt with in a
formal process for upgrading Django.  Suppress them for now so that
important information isn't lost in the noise.

cms/pytest.ini

@@ -8,6 +8,8 @@ filterwarnings =
     default
     ignore:No request passed to the backend, unable to rate-limit:UserWarning
     ignore::xblock.exceptions.FieldDataDeprecationWarning
+    ignore::django.utils.deprecation.RemovedInDjango40Warning
+    ignore::django.utils.deprecation.RemovedInDjango41Warning
 norecursedirs = envs
 python_classes =
 python_files = test.py tests.py test_*.py *_tests.py

common/lib/pytest.ini

@@ -9,6 +9,8 @@ filterwarnings =
     default
     ignore:No request passed to the backend, unable to rate-limit:UserWarning
     ignore::xblock.exceptions.FieldDataDeprecationWarning
+    ignore::django.utils.deprecation.RemovedInDjango40Warning
+    ignore::django.utils.deprecation.RemovedInDjango41Warning
 markers =
     mongo
 norecursedirs = .cache

common/test/pytest.ini

@@ -7,4 +7,6 @@ filterwarnings =
     default
     ignore:No request passed to the backend, unable to rate-limit:UserWarning
     ignore::xblock.exceptions.FieldDataDeprecationWarning
+    ignore::django.utils.deprecation.RemovedInDjango40Warning
+    ignore::django.utils.deprecation.RemovedInDjango41Warning
 norecursedirs = .cache

openedx/core/lib/logsettings.py

@@ -129,9 +129,9 @@ def log_python_warnings():
     try:
         # There are far too many of these deprecation warnings in startup to output for every management command;
         # suppress them until we've fixed at least the most common ones as reported by the test suite
-        from django.utils.deprecation import RemovedInDjango20Warning, RemovedInDjango21Warning
-        warnings.simplefilter('ignore', RemovedInDjango20Warning)
-        warnings.simplefilter('ignore', RemovedInDjango21Warning)
+        from django.utils.deprecation import RemovedInDjango40Warning, RemovedInDjango41Warning
+        warnings.simplefilter('ignore', RemovedInDjango40Warning)
+        warnings.simplefilter('ignore', RemovedInDjango41Warning)
     except ImportError:
         pass
     logging.captureWarnings(True)

setup.cfg

@@ -8,6 +8,8 @@ filterwarnings =
     default
     ignore:No request passed to the backend, unable to rate-limit:UserWarning
     ignore::xblock.exceptions.FieldDataDeprecationWarning
+    ignore::django.utils.deprecation.RemovedInDjango40Warning
+    ignore::django.utils.deprecation.RemovedInDjango41Warning
 junit_family = xunit2
 norecursedirs = .* *.egg build conf dist node_modules test_root cms/envs lms/envs
 python_classes =