kafka fetch: handle maxBytes & partitionMaxBytes #6507

Job	Run time
prepare pre-build environment for tests	33s
build-hstream-admin-store	11m 17s
build-ghc-9.2.8	30m 44s
deploy-to-minikube-ghc-${{ matrix.ghc }}	0s
integration-tests-9.2.8	21m 6s
test-ghc-9.2.8	4m 10s
integration-tests-rqlite-9.2.8	20m 13s
integration-tests-kafka-9.2.8	11m 8s
integration-tests-kafka-rqlite-9.2.8	12m 22s
distributed-tests-9.2.8	5m 36s
	1h 57m 9s

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