mysql_user: make sure current_pass_hash is a string before using it in comparison (#64059)

* make sure current_pass_hash is a string before using it in comparison

* add changelogs/fragments file

* fix changelogs/fragments file: it is actually a bugfix, not a minor change

changelogs/fragments/64059-mysql_user_fix_password_comparison.yaml

@@ -0,0 +1,2 @@
+bugfixes:
+- mysql_user - make sure current_pass_hash is a string before using it in comparison (https://github.com/ansible/ansible/issues/60567).

lib/ansible/modules/database/mysql/mysql_user.py

@@ -390,6 +390,8 @@ def user_mod(cursor, user, host, host_all, password, encrypted,
                 FROM mysql.user WHERE user = %%s AND host = %%s
                 """ % (colA[0], colA[0], colB[0], colB[0]), (user, host))
             current_pass_hash = cursor.fetchone()[0]
+            if isinstance(current_pass_hash, bytes):
+                current_pass_hash = current_pass_hash.decode('ascii')
 
             if encrypted:
                 encrypted_password = password