Fixed #30240 -- Added SHA1, SHA224, SHA256, SHA384, and SHA512 database functions.

Thanks Mariusz Felisiak and Tim Graham for reviews.

tests/db_functions/migrations/0001_setup_extensions.py

@@ -0,0 +1,13 @@
+from unittest import mock
+
+from django.db import migrations
+
+try:
+    from django.contrib.postgres.operations import CryptoExtension
+except ImportError:
+    CryptoExtension = mock.Mock()
+
+
+class Migration(migrations.Migration):
+    # Required for the SHA database functions.
+    operations = [CryptoExtension()]