Add ghc 9.8.3, update nixpkgs and ghc HEAD #2736

Job	Run time
cabal	18s
build-extra-hackages	8s
docs	20s
cabal-doExactConfig	18s
hix	40s
hydra-ifdLevel-0-and-1	10m 12s
hydra-ifdLevel-2	8m 3s
maintainer-scripts	10s
multi-target	50s
nix-build	3m 8s
plan-extra-hackages	5s
runghc	11s
shellFor-hoogle	32s
shellFor-not-depends	16s
shellFor-multiple-package	15s
shellFor-single-package	14s
tests-benchmarks	8s
unit-tests	4s
check-materialization-concurrency	20s
check-path-support	5s
closure-size	7s
haskell-nix-roots-do-not-require-IFDs	11s
hix-cabal	9s
hydra-ifdLevel-3	3m 40s
hydra-without-remote-builders-ghc8107	27s
hydra-without-remote-builders-ghc9101	12s
nix-tools	1m 39s
update-docs	8s
	32m 50s

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