[DBMON-5543] Update mysql integration tests to correctly assert on all metric emitted (DataDog#21165)

* Cleanup version specific complex innodb metric checks

* Fix system_metrics testing

* correctly assert metric calls

* correctly assert replica calls

* align complex config assertions

* cleanup and formatting

* Fix e2e test

* fix for mariadb

* Run format

Author: eric-weaver

mysql/tests/compose/mariadb.yaml

@@ -29,5 +29,7 @@ services:
       - MARIADB_MASTER_PORT_NUMBER=3306
     ports:
       - "${MYSQL_SLAVE_PORT}:3306"
+    volumes:
+      - ${MYSQL_CONF_PATH}:/opt/bitnami/mariadb/conf/my_custom.cnf:ro
     depends_on:
       - "mysql-master"

mysql/tests/conftest.py

@@ -102,7 +102,7 @@ def instance_complex():
             'schema_size_metrics': True,
             'table_size_metrics': True,
             'system_table_size_metrics': True,
-            'table_row_stats_metrics': True,
+            'table_rows_stats_metrics': True,
             'index_metrics': True,
         },
         'tags': tags.METRIC_TAGS,