Make .ghcide script compatible with Bazel 7

The `--experimental_show_artifacts` flag was removed, so we do not rely on it anymore.

Author: avdv

rules_haskell_tests/.ghcide

@@ -1,13 +1,9 @@
 #!/usr/bin/env bash
 set -euo pipefail
 build_ghcide() {
-  bazel build //tests/ghcide \
-    --experimental_show_artifacts \
-    2>&1 \
-    | awk '
-      /^>>>/ { print substr($1, 4); next }
-      { print $0 > "/dev/stderr" }
-    '
+  bazel build //tests/ghcide
+  outfile=$( bazel cquery --output=files //tests/ghcide )
+  echo "$( bazel info execution_root)/${outfile}"
 }
 ghcide="$(build_ghcide)"
 "$ghcide" "$@"