Create schema components for each response schema

[l0rn]

Always wrap response in a component schema, also paginated once, to improve processability of API code generators. Adresses #7299

Description

In djangorestframework's AutoSchema I modified the schema generation to always Provide a wrapping OperationIdResponse schema component. That serves the purpose, that if the schema generator add's more fields to the response, like pagination properties the response doesn't have to inline those fields, but instead always points to a schema component.

That makes the resulting openapi specification more processable by API client generators like openapi-generator.

Inlined responses would lead to fallback type names like InlinedRespose2000 - see #7299

[paulodhiambo]

Good update

[AndrewGuenther]

I'd love to see this get landed. @l0rn do you have some time to update this PR to resolve the conflicts? If not, I wouldn't mind doing it. Once that's done, @carltongibson @tomchristie is this a change you'd be interested in? Looks like it was good to go but just fell through the cracks.

[l0rn]

Heyho, If I get the hint that this is gonna bei merged after all i'll gladly resolve conflicts

[stale]

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