graceful-teardown: warns about usage of `require` in `t.Cleanup` functions and suite teardown methods

[Antonboom]

func (s *ServiceIntegrationSuite) TearDownTest() {
    if p := s.verdictsProducer; p != nil {
        s.Require().NoError(p.Close()) ❌
    }
    if c := s.dlqVerdictsConsumer; c != nil {
        s.NoError(c.Close())
    }
    s.DBSuite.TearDownTest()
    s.ks.TearDownTest()
}