[3.2.x] Fixed collation tests on MySQL 8.0.30+.

The utf8_ collations are renamed to utf8mb3_* on MySQL 8.0.30+.

Backport of 88dba2e from main.

Author: felixxm

django/db/backends/mysql/features.py

@@ -51,9 +51,15 @@ class DatabaseFeatures(BaseDatabaseFeatures):
     @cached_property
     def test_collations(self):
         charset = 'utf8'
-        if self.connection.mysql_is_mariadb and self.connection.mysql_version >= (10, 6):
-            # utf8 is an alias for utf8mb3 in MariaDB 10.6+.
-            charset = 'utf8mb3'
+        if (
+            self.connection.mysql_is_mariadb
+            and self.connection.mysql_version >= (10, 6)
+        ) or (
+            not self.connection.mysql_is_mariadb
+            and self.connection.mysql_version >= (8, 0, 30)
+        ):
+            # utf8 is an alias for utf8mb3 in MariaDB 10.6+ and MySQL 8.0.30+.
+            charset = "utf8mb3"
         return {
             'ci': f'{charset}_general_ci',
             'non_default': f'{charset}_esperanto_ci',