Add ghc 9.8.3, update nixpkgs and ghc HEAD #2738

Job	Run time
cabal	1m 29s
build-extra-hackages	2m 6s
cabal-doExactConfig	1m 34s
check-materialization-concurrency	20s
check-path-support	39s
closure-size	3s
docs	2m 17s
haskell-nix-roots-do-not-require-IFDs	3m 9s
hix-cabal	4m 38s
hix	4m 14s
hydra-ifdLevel-0-and-1	3m 43s
hydra-ifdLevel-2	11m 11s
hydra-ifdLevel-3	30m 15s
hydra-without-remote-builders-ghc8107	28s
hydra-without-remote-builders-ghc9101	34s
maintainer-scripts	9s
multi-target	11s
nix-build	31s
nix-tools	37s
plan-extra-hackages	5s
runghc	12s
shellFor-hoogle	22s
shellFor-multiple-package	12s
shellFor-not-depends	11s
shellFor-single-package	13s
tests-benchmarks	7s
unit-tests	4s
update-docs	8s
	1h 9m 42s

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