Use haskell-language-server 2.11 #3200

Job	Run time
runghc	1m 6s
nix-build	57s
cabal	1m 7s
maintainer-scripts	29s
hix	43s
cabal-doExactConfig	1m 7s
docs	41s
tests-benchmarks	13s
shellFor-single-package	22s
shellFor-not-depends	21s
plan-extra-hackages	12s
shellFor-hoogle	32s
shellFor-multiple-package	18s
unit-tests	9s
multi-target	1m 53s
build-extra-hackages	11s
check-path-support	12s
check-materialization-concurrency	24s
haskell-nix-roots-do-not-require-IFDs	1m 0s
hix-cabal	12s
hydra-ifdLevel-0-and-1	5m 23s
update-docs	8s
hydra-ifdLevel-2	20m 17s
closure-size	9s
hydra-without-remote-builders-ghc9102	5m 17s
hydra-without-remote-builders-ghc967	3m 16s
check-nix-tools	15s
hydra-ifdLevel-3	30m 18s
	1h 17m 12s

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