kafka: add naïve OffsetFetch and OffsetCommit handler #6173

Job	Run time
prepare pre-build environment for tests	20s
prepare pre-build environment for tests	20s
prepare pre-build environment for tests	20s
build-hstream-admin-store	10m 12s
build-hstream-admin-store	10m 12s
build-hstream-admin-store	10m 12s
ghc-9.2.8	42m 24s
ghc-9.2.8	42m 24s
ghc-9.2.8	42m 24s
distributed-tests-ghc-9.2.8	6m 45s
distributed-tests-ghc-9.2.8	6m 45s
distributed-tests-ghc-9.2.8	6m 45s
integration-tests-ghc-9.2.8	8m 8s
integration-tests-ghc-9.2.8	8m 12s
integration-tests-ghc-9.2.8	22m 8s
deploy-to-minikube-ghc-${{ matrix.ghc }}	0s
deploy-to-minikube-ghc-${{ matrix.ghc }}	0s
deploy-to-minikube-ghc-${{ matrix.ghc }}	0s
integration-tests-rqlite-ghc-9.2.8	7m 22s
integration-tests-rqlite-ghc-9.2.8	23m 31s
integration-tests-rqlite-ghc-9.2.8	23m 31s
	4h 31m 55s

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