Add nixpkgs-2505 #3156

Job	Run time
nix-build	2m 57s
runghc	40s
unit-tests	6s
cabal	32s
cabal-doExactConfig	45s
multi-target	1m 5s
shellFor-multiple-package	46s
shellFor-single-package	57s
tests-benchmarks	9s
build-extra-hackages	12s
closure-size	6s
docs	36s
hix	37s
hydra-ifdLevel-0-and-1	3m 56s
hydra-ifdLevel-2	16m 47s
hydra-ifdLevel-3	30m 16s
maintainer-scripts	9s
plan-extra-hackages	6s
shellFor-hoogle	14s
shellFor-not-depends	16s
update-docs	7s
check-materialization-concurrency	19s
check-path-support	16s
haskell-nix-roots-do-not-require-IFDs	22s
hix-cabal	13s
hydra-without-remote-builders-ghc9102	2m 46s
hydra-without-remote-builders-ghc967	2m 49s
nix-tools	12s
	1h 8m 16s

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