ci: Remove duplicate -Wall from cabal configure

-Wall is already enabled in package.yaml, so there is no need to enable
it again in the `cabal configure` step in CI. Actually, this results in
problems for GHC 9.2, since we disable -Wunticked-promoted-constructors
in package.yaml, but adding -Wall to cabal configure re-enables it.

Author: pgujjula

.woodpecker/build_test.yaml

@@ -25,7 +25,7 @@ steps:
           --enable-tests
           --test-show-details=streaming
           --enable-benchmarks
-          --ghc-options="-Werror -Wall"
+          --ghc-options="-Werror"
           --test-options='-p "$0 !~ /exhaustive/"'
           --disable-optimization
       - cabal outdated --exit-code --ignore=base