Fix namespace tagging for latency metrics (#6345)
Fix namespace tagging for latency metrics (#6345)

Co-authored-by: Thomas Hervé <c7be10f2119e2e46cb646e25a5134252a2fe801d@datadoghq.com>
DataDog/integrations-core,DataDog/integrations-core,DataDog/integrations-core,DataDog/integrations-core,DataDog/integrations-core,DataDog/integrations-core,DataDog/integrations-core,DataDog/integrations-core,DataDog/integrations-core,DataDog/integrations-core