Added a test from andrea-s

dbms/tests/queries/0_stateless/01053_drop_database_mat_view.reference

+my_table
+.inner.my_materialized_view
+my_materialized_view
+my_table

dbms/tests/queries/0_stateless/01053_drop_database_mat_view.sql

+DROP DATABASE IF EXISTS some_tests;
+CREATE DATABASE some_tests;
+
+create table some_tests.my_table ENGINE = MergeTree(day, (day), 8192) as select today() as day, 'mystring' as str;
+show tables from some_tests;
+create materialized view some_tests.my_materialized_view ENGINE = MergeTree(day, (day), 8192) as select * from some_tests.my_table;
+show tables from some_tests;
+select * from some_tests.my_materialized_view;
+
+DROP DATABASE some_tests;