Build

ci: windows: use builtin GHC clang toolchain to build dependencies #2924

Job	Run time
extra-tests (ubuntu-latest)	7m 52s
nix-build (linux-x64)	21m 45s
extra-tests (macos-latest)	6m 58s
nix-build (osx-x64)	28m 1s
nix-build (osx-arm64)	9m 8s
cabal-check	3m 12s
bitwuzla-build (win64 target) / build	3s
build (windows-latest)	28m 28s
	1h 45m 27s

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