Add logging relation to seldon-core #638

Job	Run time
Run Tests / Get integration environments	4s
Publish Charm / Generate the Charm Matrix	3s
Run Tests / Unit Test	21s
Run Tests / Lint Check	17s
Run Tests / Check libraries / Lint	12s
Run Tests / Check libraries / Check libraries	31s
Publish Charm / Publish Charm (./)	3m 25s
Run Tests / Integration Test (build and deploy) (seldon-servers-integration -- -k huggingface)	6m 44s
Run Tests / Integration Test (build and deploy) (seldon-servers-integration -- -k mlflowserver-v1)	6m 42s
Run Tests / Integration Test (build and deploy) (seldon-servers-integration -- -k xgboost-v2)	6m 48s
Run Tests / Integration Test (build and deploy) (seldon-servers-integration -- -k tf-serving)	6m 48s
Run Tests / Integration Test (build and deploy) (seldon-servers-integration -- -k sklearn-v2)	6m 48s
Run Tests / Integration Test (build and deploy) (seldon-servers-integration -- -k mlflowserver-v2)	6m 47s
Run Tests / Integration Test (build and deploy) (seldon-servers-integration -- -k tensorflow)	6m 47s
Run Tests / Integration Test (build and deploy) (seldon-servers-integration -- -k xgboost-v1)	6m 47s
Run Tests / Integration Test (build and deploy) (seldon-servers-integration -- -k sklearn-v1)	6m 47s
Run Tests / Integration Test (build and deploy) (charm-integration --)	6m 47s
	1h 12m 38s

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