chore: update fixtures scope that are loading data into the analytical db (#17780)

* Update db setup fixture scope

* Load data into db only once

* Update fixture scopes for data loading

* cleanup imports

* try import

* Update scope

* fix cleanup

* Import all fixtures

* Separate data log and metadata creation

* Retain table description

* fix dtype

Co-authored-by: Bogdan Kyryliuk <bogdankyryliuk@dropbox.com>

tests/integration_tests/cache_tests.py

@@ -24,6 +24,7 @@ from superset.common.db_query_status import QueryStatus
 from superset.extensions import cache_manager
 from tests.integration_tests.fixtures.birth_names_dashboard import (
     load_birth_names_dashboard_with_slices,
+    load_birth_names_data,
 )
 
 from .base_tests import SupersetTestCase