Add ghc 9.8.3, update nixpkgs and ghc HEAD #2737

Job	Run time
build-extra-hackages	48s
cabal	50s
cabal-doExactConfig	50s
check-materialization-concurrency	26s
check-path-support	19s
closure-size	3s
docs	1m 13s
haskell-nix-roots-do-not-require-IFDs	17s
hix-cabal	4m 15s
hix	4m 9s
hydra-ifdLevel-0-and-1	3m 59s
hydra-ifdLevel-2	15m 14s
hydra-ifdLevel-3	30m 11s
hydra-without-remote-builders-ghc9101	3m 19s
hydra-without-remote-builders-ghc8107	4m 53s
maintainer-scripts	11s
multi-target	50s
nix-build	2m 18s
nix-tools	41s
plan-extra-hackages	7s
shellFor-hoogle	19s
runghc	13s
shellFor-multiple-package	14s
shellFor-not-depends	17s
shellFor-single-package	15s
tests-benchmarks	10s
unit-tests	4s
update-docs	4s
	1h 16m 29s

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