Fix test_extended_const after recent binaryen change. NFC (#21492)

See WebAssembly/binaryen#6379

test/test_other.py

@@ -13550,9 +13550,9 @@ def test_extended_const(self):
     self.do_runf('hello_world.c', emcc_args=['-sEXPORTED_FUNCTIONS=_main,___stdout_used', '-mextended-const', '-sMAIN_MODULE=2'])
     wat = self.get_wasm_text('hello_world.wasm')
     # Test that extended-const expressions are used in the data segments.
-    self.assertTrue(re.search(r'\(data (\$\S+ )?\(i32.add\s+\(global.get \$\S+\)\s+\(i32.const \d+\)', wat))
+    self.assertContained(r'\(data (\$\S+ )?\(offset (i32.add\s+\(global.get \$\S+\)\s+\(i32.const \d+\)', wat, regex=True)
     # Test that extended-const expressions are used in at least one global initializer.
-    self.assertTrue(re.search(r'\(global \$\S+ i32 \(i32.add\s+\(global.get \$\S+\)\s+\(i32.const \d+\)', wat))
+    self.assertContained(r'\(global \$\S+ i32 \(i32.add\s+\(global.get \$\S+\)\s+\(i32.const \d+\)', wat, regex=True)
 
   # Smoketest for MEMORY64 setting.  Most of the testing of MEMORY64 is by way of the wasm64
   # variant of the core test suite.