Schemas: Replace registry generation and github workflow (#83490)

* Create small registries for core and composable kinds

* Update workflow with new registries

* Fix imports in plugin schemas and deleted old registry generation files

* Remove verification and maturity

* Modify registries and add missing composable information to make schemas in kind-registry work

* Add missing aliases

* Remove unused templates

* Remove kinds verification

* Format generated code

* Add gen header

* Delete unused code and clean path in composable template

* Delete kind-registry loader

* Delete unused code

* Update License link

* Update codeowners path

* Sort imports

* More cleanup

* Remove verify-kinds.yml from codeowners

* Fix lint

* Update composable_kidns

* Fix cue extension

* Restore verify-kinds to avoid to push outdated kind's registry

* Fix composable format

* Restore code owners for verify-kinds

* Remove verify check

Author: spinillos

.github/CODEOWNERS

@@ -630,7 +630,7 @@ embed.go @grafana/grafana-as-code
 /pkg/registry/apis/ @grafana/grafana-app-platform-squad
 /pkg/codegen/ @grafana/grafana-as-code
 /pkg/kinds/*/*_gen.go @grafana/grafana-as-code
-/pkg/registry/corekind/ @grafana/grafana-as-code
+/pkg/registry/schemas/ @grafana/grafana-as-code
 /public/app/plugins/*gen.go @grafana/grafana-as-code
 /cue.mod/ @grafana/grafana-as-code