ci(mysql): drop outdated config options

Also make them look as recommended in the documentation.

.ci/docker-compose-file/docker-compose-mysql-tcp.yaml

@@ -13,10 +13,9 @@ services:
     networks:
       - emqx_bridge
     command:
-      --bind-address "::"
-      --character-set-server=utf8mb4
-      --collation-server=utf8mb4_general_ci
-      --explicit_defaults_for_timestamp=true
-      --lower_case_table_names=1
-      --max_allowed_packet=128M
-      --skip-symbolic-links
+      - --bind-address=0.0.0.0
+      - --character-set-server=utf8mb4
+      - --collation-server=utf8mb4_general_ci
+      - --lower-case-table-names=1
+      - --max-allowed-packet=128M
+      - --skip-symbolic-links

.ci/docker-compose-file/docker-compose-mysql-tls.yaml

@@ -23,9 +23,8 @@ services:
       - --port=3306
       - --character-set-server=utf8mb4
       - --collation-server=utf8mb4_general_ci
-      - --explicit_defaults_for_timestamp=true
-      - --lower_case_table_names=1
-      - --max_allowed_packet=128M
+      - --lower-case-table-names=1
+      - --max-allowed-packet=128M
       - --ssl-ca=/etc/certs/ca-cert.pem
       - --ssl-cert=/etc/certs/server-cert.pem
       - --ssl-key=/etc/certs/server-key.pem