Add ghc 9.8.3, update nixpkgs and ghc HEAD #2682

Job	Run time
runghc	31m 57s
nix-build	1h 23m 44s
unit-tests	13s
cabal-doExactConfig	32m 8s
multi-target	55m 57s
cabal	32m 3s
shellFor-single-package	23m 48s
tests-benchmarks	19s
build-extra-hackages	2m 16s
check-materialization-concurrency	1m 14s
check-path-support	3m 50s
closure-size	10s
docs	1m 47s
haskell-nix-roots-do-not-require-IFDs	1h 7m 27s
hix	9m 1s
hix-cabal	1h 5m 7s
hydra-ifdLevel-0-and-1	7m 42s
hydra-ifdLevel-2	6m 9s
hydra-ifdLevel-3	4m 12s
hydra-without-remote-builders-ghc8107	36s
hydra-without-remote-builders-ghc9101	41s
maintainer-scripts	58s
nix-tools	1m 58s
plan-extra-hackages	26s
shellFor-hoogle	37s
shellFor-multiple-package	42s
shellFor-not-depends	57s
update-docs	15s
	7h 16m 14s

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