[MAINTENANCE] Bump mysql max_connections for tests (#11023)

Author: tyler-hoffman

assets/docker/mysql/conf.d/mysql.cnf

@@ -30,6 +30,6 @@
 
 [mysqld]
 # looks like mysql is slow to release connections. tests should clean up connections, but adding some buffer
-max_connections = 300
+max_connections = 1000
 # https://stackoverflow.com/questions/36829911/how-to-resolve-order-by-clause-is-not-in-select-list-caused-mysql-5-7-with-sel
 sql_mode		=	''