fix: use oracle mysql80 image in devstack (#1116)

Fixes mysql80 for devstack on Apple Silicon

Author: Rebecca Graber

docker-compose.yml

@@ -259,7 +259,9 @@ services:
     environment:
       MYSQL_ROOT_PASSWORD: ""
       MYSQL_ALLOW_EMPTY_PASSWORD: "yes"
-    image: mysql:8.0.26
+    # Oracle-packaged version includes a `linux/arm64/v8` version, needed for
+    # machines with Apple Silicon CPUs (Mac M1, M2)
+    image: mysql:8.0.33-oracle
     networks:
       default:
         aliases: