chore(contracts-bedrock): print error message if generate-l2-genesis.sh fails (#9566)

* chore(contracts-bedrock): print error message if generate-l2-genesis.sh fails

* add quotes

packages/contracts-bedrock/scripts/generate-l2-genesis.sh

@@ -63,12 +63,16 @@ if mkdir -- "$LOCKDIR" > /dev/null 2>&1; then
   fi
 
   if [ ! -f "$OUTFILE_L2" ]; then
-    go run "$OP_NODE" genesis l2 \
+    tempfile=$(mktemp)
+    if ! go run "$OP_NODE" genesis l2 \
       --deploy-config "$CONTRACTS_DIR/deploy-config/hardhat.json" \
       --l1-deployments "$DEPLOY_ARTIFACT" \
       --l1-starting-block "$L1_STARTING_BLOCK_PATH" \
       --outfile.l2 "$OUTFILE_L2" \
-      --outfile.rollup "$OUTFILE_ROLLUP" > /dev/null 2>&1
+      --outfile.rollup "$OUTFILE_ROLLUP" 2>"$tempfile"; then
+      cat "$tempfile" >&2
+    fi
+    rm "$tempfile"
   fi
 else
   # Wait up to 5 minutes for the lock to be released