test: skip test-child-process-stdio-reuse-readable-stdio on Windows

It is flaky due to the same cause of test-child-process-pipe-dataflow
being flaky - cygwin quirks - so skip it on Windows too.

Drive-by: remove the skip mark of test-child-process-pipe-dataflow
in the status file and directly skip it in the test with a comment.

PR-URL: #49621
Backport-PR-URL: #51132
Co-authored-by: Artur Yapparov <arturufa88@gmail.com>
Reviewed-By: Debadree Chatterjee <debadree333@gmail.com>
Reviewed-By: Michaël Zasso <targos@protonmail.com>
Reviewed-By: LiviaMedeiros <livia@cirno.name>
Reviewed-By: Luigi Pinca <luigipinca@gmail.com>
Reviewed-By: Moshe Atlow <moshe@atlow.co.il>

Author: 2 people

test/parallel/parallel.status

@@ -11,9 +11,6 @@ prefix parallel
 test-crypto-keygen: PASS,FLAKY
 # https://github.com/nodejs/node/issues/41201
 test-fs-rmdir-recursive: PASS, FLAKY
-# https://github.com/nodejs/node/issues/48300
-test-child-process-pipe-dataflow: PASS, FLAKY
-test-child-process-stdio-reuse-readable-stdio: PASS, FLAKY
 # https://github.com/nodejs/node/issues/49985
 test-runner-watch-mode: PASS, FLAKY
 # https://github.com/nodejs/node/issues/50295

test/parallel/test-child-process-pipe-dataflow.js

@@ -1,5 +1,11 @@
 'use strict';
 const common = require('../common');
+
+if (common.isWindows) {
+  // https://github.com/nodejs/node/issues/48300
+  common.skip('Does not work with cygwin quirks on Windows');
+}
+
 const assert = require('assert');
 const path = require('path');
 const fs = require('fs');

test/parallel/test-child-process-stdio-reuse-readable-stdio.js

@@ -1,5 +1,11 @@
 'use strict';
 const common = require('../common');
+
+if (common.isWindows) {
+  // https://github.com/nodejs/node/issues/48300
+  common.skip('Does not work with cygwin quirks on Windows');
+}
+
 const assert = require('assert');
 const { spawn } = require('child_process');