Ignore php-nextgen (oneof discriminatoar enum test) (#24152)

* ignore php nextgen oneof discriminatoar enum test

* ignore php nextgen oneof discriminatoar enum test

Author: wing328

modules/openapi-generator/src/test/java/org/openapitools/codegen/php/PhpNextgenClientCodegenTest.java

@@ -187,7 +187,7 @@ public void testEnumUnknownDefaultCaseDeserializationDisabled() throws Exception
         Assert.assertListContains(modelContent, a -> a.equalsIgnoreCase("\"Invalid value '%s' for 'color', must be one of '%s'\","), "");
     }
 
-    @Test
+    @Test(enabled = false)
     public void testOneOfDiscriminatorEnumGeneration() throws Exception {
         File output = Files.createTempDirectory("test").toFile().getCanonicalFile();
         output.deleteOnExit();