[Inline model resolver] various improvements (#12293)

* better handling of requestbody in the inline resolver

* remove commented code

* better request body naming

* fix unique naming

* minor code format change

* removed additional underscore from names, fix test

* more fixes, update tests

* fix all tests

* undo changes to default codegen

* update samples

* update python tests

* add new files

* update samples

samples/server/petstore/rust-server/output/rust-server-test/api/openapi.yaml

@@ -17,18 +17,10 @@ paths:
     put:
       operationId: dummyPut
       requestBody:
-        $ref: '#/components/requestBodies/inline_object'
         content:
           '*/*':
             schema:
-              properties:
-                id:
-                  type: string
-                password:
-                  type: string
-              required:
-              - id
-              type: object
+              $ref: '#/components/schemas/dummyPut_request'
         required: true
       responses:
         "200":
@@ -144,12 +136,6 @@ components:
             - id
             type: object
       required: true
-    inline_object:
-      content:
-        '*/*':
-          schema:
-            $ref: '#/components/schemas/inline_object'
-      required: true
   schemas:
     additionalPropertiesObject:
       additionalProperties:
@@ -194,7 +180,7 @@ components:
           description: Inner string
           type: string
       type: object
-    inline_object:
+    dummyPut_request:
       properties:
         id:
           type: string