Reorganize hstream-kafka modules #6129

Job	Run time
prepare pre-build environment for tests	16s
prepare pre-build environment for tests	16s
build-hstream-admin-store	2m 20s
build-hstream-admin-store	2m 20s
ghc-9.2.8	53m 13s
ghc-9.2.8	1h 10m 20s
distributed-tests-ghc-${{ matrix.ghc }}	0s
deploy-to-minikube-ghc-${{ matrix.ghc }}	0s
deploy-to-minikube-ghc-${{ matrix.ghc }}	0s
integration-tests-ghc-${{ matrix.ghc }}	0s
integration-tests-rqlite-ghc-${{ matrix.ghc }}	0s
distributed-tests-ghc-9.2.8	5m 44s
integration-tests-ghc-9.2.8	28m 29s
integration-tests-rqlite-ghc-9.2.8	28m 33s
	3h 11m 31s

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