EMTEST_AUTOSKIP Node.js 25 tests (#26342)

When EMTEST_AUTOSKIP=1 and current Node.js version is less than 25, then
skip the Node.js 25 requiring tests automatically.

Author: juj

test/common.py

@@ -486,6 +486,8 @@ def require_node_25(self):
     if not nodejs:
       self.skipTest('Test requires nodejs to run')
     if not self.try_require_node_version(25, 0, 0):
+      if os.getenv('EMTEST_AUTOSKIP') == '1':
+        self.skipTest('test requires node v25 and current Node.js version is older than this, with EMTEST_AUTOSKIP being set')
       self.fail('node v25 required to run this test.  Use EMTEST_SKIP_NODE_25 to skip')
 
   def require_engine(self, engine, force=False):