WIP: Replace network with etcd #7251

Job	Run time
Benchmarks (hydra-node, tx-cost, --output-directory $(pwd)/../benchmarks)	1m 54s
Build specification using nix	1m 11s
Build & test (hydra-plutus)	1m 0s
Benchmarks (hydra-node, micro, -o $(pwd)/../benchmarks/ledger-bench.html)	1m 30s
Build & test (hydra-tx)	1m 48s
Benchmarks (hydra-cluster, bench-e2e, datasets datasets/1-node.json datasets/3-nodes.json --outpu...	2m 39s
Build & test (hydra-chain-observer)	53s
Build haddock using nix	42s
Build & test (hydra-node)	8m 43s
Build & test (hydra-tui)	3m 56s
nix flake check	4m 1s
Build & test (hydra-cluster)	8m 59s
Compute cost differences	3m 53s
Publish benchmark results	0s
Documentation	0s
	41m 9s

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