Add ghc 9.8.3, update nixpkgs and ghc HEAD #2684

Job	Run time
cabal-doExactConfig	1m 45s
cabal	1m 47s
nix-build	1h 1m 5s
runghc	11m 35s
unit-tests	5s
tests-benchmarks	1m 16s
build-extra-hackages	1m 12s
check-materialization-concurrency	20s
check-path-support	1m 10s
closure-size	3s
docs	49s
haskell-nix-roots-do-not-require-IFDs	2m 3s
hix	17m 21s
hydra-ifdLevel-0-and-1	16m 55s
hydra-ifdLevel-2	3m 48s
hydra-ifdLevel-3	3m 42s
hydra-without-remote-builders-ghc8107	30s
multi-target	12m 27s
maintainer-scripts	39s
plan-extra-hackages	20s
shellFor-hoogle	11m 27s
shellFor-multiple-package	10m 40s
shellFor-not-depends	15s
shellFor-single-package	22s
update-docs	5s
hix-cabal	10m 11s
hydra-without-remote-builders-ghc9101	10s
nix-tools	28s
	2h 52m 30s

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