Use hackage.nix/index-state.nix #3225

Job	Run time
nix-build	3m 31s
runghc	53s
unit-tests	28s
cabal	1m 8s
plan-extra-hackages	35s
shellFor-not-depends	1m 24s
closure-size	8s
cabal-doExactConfig	1m 7s
build-extra-hackages	11s
hydra-ifdLevel-2	17m 12s
shellFor-multiple-package	30s
docs	16m 50s
check-materialization-concurrency	23s
multi-target	1m 55s
tests-benchmarks	13s
hix	2m 28s
hydra-ifdLevel-0-and-1	4m 48s
hydra-ifdLevel-3	30m 17s
shellFor-single-package	23s
shellFor-hoogle	17s
maintainer-scripts	9s
check-nix-tools	17s
check-path-support	20s
haskell-nix-roots-do-not-require-IFDs	31s
update-docs	12s
hydra-without-remote-builders-ghc9102	3m 3s
hydra-without-remote-builders-ghc967	3m 17s
hix-cabal	4m 55s
	1h 37m 25s

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