chore(deps): update google.golang.org/grpc to v1.79.3 #291

Job	Run time
lint	2m 26s
list-examples	4s
test	32s
docker (resource-broker, Dockerfile)	1m 1s
test-e2e	32s
docker (resource-broker-operator, cmd/operator/Dockerfile)	1m 7s
docker (resource-broker-kcp, contrib/kcp/Dockerfile)	46s
examples	0s
	6m 28s

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