Fix sqlalchemy
Fix sqlalchemy

Inplicit execution was deprecated in SQLAlhcemy, version 1.4 doesn't
support and we need to convert to explicit[1]

[1] https://docs.sqlalchemy.org/en/14/changelog/migration_20.html#implicit-and-connectionless-execution-bound-metadata-removed

Change-Id: I4a780567fb92c32cf55c54e2e134df9456e36165

openstack/ironic-inspector,openstack/ironic-inspector