[Inline model resolver] better handling of inline responses and bug fixes (#12353)

* better handling of inline response schemas, bug fixes

* update samples

* add new files

* better code format

* remove unused ruby files

* fix java test

* remove unused js spec files

* remove inline_response_default_test.dart

* fix webclient tests

* fix spring tests

samples/client/petstore/java/jersey3/api/openapi.yaml

@@ -48,7 +48,7 @@ paths:
           content:
             application/json:
               schema:
-                $ref: '#/components/schemas/inline_response_default'
+                $ref: '#/components/schemas/_foo_get_default_response'
           description: response
       x-accepts: application/json
   /pet:
@@ -2136,7 +2136,7 @@ components:
             $ref: '#/components/schemas/Bar'
           type: array
       type: object
-    inline_response_default:
+    _foo_get_default_response:
       example:
         string:
           bar: bar