Add ghc 9.8.3, update nixpkgs and ghc HEAD #2723

Job	Run time
cabal	11s
build-extra-hackages	5s
cabal-doExactConfig	11s
check-materialization-concurrency	18s
check-path-support	4s
closure-size	7s
docs	22s
haskell-nix-roots-do-not-require-IFDs	8s
hix-cabal	7s
hix	29s
hydra-ifdLevel-0-and-1	2m 32s
hydra-ifdLevel-3	30m 17s
hydra-ifdLevel-2	2m 26s
hydra-without-remote-builders-ghc8107	2m 9s
hydra-without-remote-builders-ghc9101	1m 52s
maintainer-scripts	9s
multi-target	5m 0s
nix-build	10m 38s
nix-tools	26s
plan-extra-hackages	11s
runghc	18s
shellFor-hoogle	17s
shellFor-multiple-package	17s
shellFor-single-package	17s
shellFor-not-depends	17s
tests-benchmarks	15s
unit-tests	5s
update-docs	4s
	59m 32s

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