Hydra clean updates #6126

Job	Run time
Build specification using nix	1m 38s
Benchmarks (hydra-node, tx-cost, --output-directory $(pwd)/../benchmarks)	2m 36s
Build & test (hydra-plutus)	1m 38s
Benchmarks (hydra-node, micro, -o $(pwd)/../benchmarks/ledger-bench.html)	3m 6s
Build & test (hydra-tui)	3m 18s
Build & test (hydra-node)	8m 5s
Benchmarks (hydra-cluster, bench-e2e, datasets datasets/1-node.json datasets/3-nodes.json --outpu...	4m 24s
Build haddock using nix	1m 4s
Build & test (hydra-tx)	1m 54s
Build & test (hydra-cluster)	8m 35s
nix flake check	5m 51s
Compute cost differences	3m 37s
Publish benchmark results	0s
Documentation	2m 44s
Publish test results	7s
	48m 37s

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