[Spike] Investigate open api configuration issue with `x-go-types-import` on index/server

[thepetk]

Which area is this issue related to?

/area registry

Issue Description

During the upgrade of registry-support to go 1.21 we've experienced an issue with the oapi-codegen framework. More detailed after the addition of the sigs.k8s.io/structured-merge-diff/v4/schema the imports on types.gen.go were updated and the generator/schema package was removed (info here.

As a workaround we hardcoded the generator schema package on the index/server/config/types.yaml template, but ideally we would like to keep the same open API configuration and avoiding having hardcoded things on templates.

This issue's scope is to explore solutions for this issue, even by trying different generation frameworks.

Acceptance Criteria

• Investigation report has been shared here and required issues (if any) have been created

[github-actions]

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