stream: fix pipeline with dest in objectMode

pipeline did not support destination with generator
that does not return strings or buffers.

PR-URL: #32414
Reviewed-By: Matteo Collina <matteo.collina@gmail.com>
Reviewed-By: Luigi Pinca <luigipinca@gmail.com>
Reviewed-By: James M Snell <jasnell@gmail.com>
Reviewed-By: Trivikram Kamat <trivikr.dev@gmail.com>

lib/internal/streams/pipeline.js

@@ -228,7 +228,9 @@ function pipeline(...streams) {
         // always returns a stream which can be further
         // composed through `.pipe(stream)`.
 
-        const pt = new PassThrough();
+        const pt = new PassThrough({
+          objectMode: true
+        });
         if (isPromise(ret)) {
           ret
             .then((val) => {

test/parallel/test-stream-pipeline.js

@@ -1049,3 +1049,15 @@ const { promisify } = require('util');
   src.push('asd');
   dst.destroy();
 }
+
+{
+  pipeline(async function * () {
+    yield 'asd';
+  }, async function * (source) {
+    for await (const chunk of source) {
+      yield { chunk };
+    }
+  }, common.mustCall((err) => {
+    assert.ifError(err);
+  }));
+}