Pagination schemas are not OpenAPI 3.1 compatible by default

[federicobond]

Describe the bug

When generating OpenAPI schemas for paginated responses, drf-spectacular does not apply the tweaks for OpenAPI 3.1 schemas found in the drf_spectacular.plumbing.append_meta function. The 3.0 schema is copied as is without changes.

To Reproduce

Create a paginated view and check the generated schema.

Expected behavior

An OpenAPI 3.1 compatible schema is returned. Individual field schemas should not contain nullable or example properties.