test(clickhouse): clean up unconditionally

ibis/backends/tests/test_client.py

@@ -1360,26 +1360,26 @@ def test_overwrite(ddl_con, monkeypatch):
         assert t2.count().execute() == expected_count
 
 
-@contextlib.contextmanager
-def create_and_destroy_db(con):
-    con.create_database(dbname := gen_name("db"))
-    try:
-        yield dbname
-    finally:
-        con.drop_database(dbname)
+@pytest.fixture(scope="session")
+def tmp_db(con_create_database):
+    con_create_database.create_database(dbname := gen_name("db"))
+    yield dbname
+    con_create_database.drop_database(dbname)
 
 
 # TODO: move this to something like `test_ddl.py`
-def test_insert_with_database_specified(con_create_database):
+def test_insert_with_database_specified(con_create_database, tmp_db):
     con = con_create_database
 
     t = ibis.memtable({"a": [1, 2, 3]})
 
-    with create_and_destroy_db(con) as dbname:
-        con.create_table(table_name := gen_name("table"), obj=t, database=dbname)
-        con.insert(table_name, obj=t, database=dbname)
-        assert con.table(table_name, database=dbname).count().to_pandas() == 6
-        con.drop_table(table_name, database=dbname)
+    con.create_table(table_name := gen_name("table"), obj=t, database=tmp_db)
+
+    try:
+        con.insert(table_name, obj=t, database=tmp_db)
+        assert con.table(table_name, database=tmp_db).count().to_pandas() == 6
+    finally:
+        con.drop_table(table_name, database=tmp_db)
 
 
 @pytest.mark.notyet(["datafusion"], reason="cannot list or drop catalogs")