Better handling of Inline schema (#15682)

* skip allOf inline subschema created as $ref

* add option for fallback

* add back atleastonemodel

* add log

* update java, kotlin, js samples

* update tests

* fix native client test

* fix java client errors by regenerating test files

* clean up python

* clean up powershell

* clean up php

* clean up ruby

* update erlang, elixir

* update dart samples

* update ts samples

* update r, go samples

* update perl

* update swift

* add back files

* add back files

* remove outdated test files

* fix test

samples/client/petstore/spring-http-interface-reactive/.openapi-generator/FILES

@@ -20,16 +20,13 @@ src/main/java/org/openapitools/model/ArrayOfArrayOfNumberOnly.java
 src/main/java/org/openapitools/model/ArrayOfNumberOnly.java
 src/main/java/org/openapitools/model/ArrayTest.java
 src/main/java/org/openapitools/model/BigCat.java
-src/main/java/org/openapitools/model/BigCatAllOf.java
 src/main/java/org/openapitools/model/Capitalization.java
 src/main/java/org/openapitools/model/Cat.java
-src/main/java/org/openapitools/model/CatAllOf.java
 src/main/java/org/openapitools/model/Category.java
 src/main/java/org/openapitools/model/ClassModel.java
 src/main/java/org/openapitools/model/Client.java
 src/main/java/org/openapitools/model/ContainerDefaultValue.java
 src/main/java/org/openapitools/model/Dog.java
-src/main/java/org/openapitools/model/DogAllOf.java
 src/main/java/org/openapitools/model/EnumArrays.java
 src/main/java/org/openapitools/model/EnumClass.java
 src/main/java/org/openapitools/model/EnumTest.java