ci: skip pipeline.js on Node 18 in the native test matrix

Node 18 lacks --test-force-exit (the wasm exporter keeps the event loop alive
after a flush) and the wasm HTTP client leaves a mock-agent socket open that
node:test cannot drain there, so test/pipeline.js cannot exit cleanly on Node
18. Skip it on a Node without --test-force-exit. The pipeline wasm is fully
covered by the build-test-wasm job and the Node 20/22/24/26 runs here, so this
loses no real coverage (it is platform/Node-independent wasm).

Author: bengl

scripts/test.sh

@@ -32,6 +32,15 @@ run_test() {
 
 # Run top-level test files
 for f in test/*.js; do
+  # pipeline.js's wasm exporter keeps the event loop alive after a flush, so it
+  # needs --test-force-exit. Node 18 lacks that flag AND the wasm HTTP client
+  # leaves a mock-agent socket open, so node:test cannot exit cleanly there. The
+  # pipeline wasm is fully exercised by the build-test-wasm job and by the
+  # Node 20/22/24/26 runs here, so skip it on a Node without --test-force-exit.
+  if [ "$f" = "test/pipeline.js" ] && ! node --test-force-exit --eval '' >/dev/null 2>&1; then
+    echo "Skipping $f (no --test-force-exit on this Node; covered by build-test-wasm + newer Node)"
+    continue
+  fi
   run_test "$f"
 done