Codegen: Isolate schema generation code (#98742)

* Create go.mod files for plugins and core kinds

* Update go work and main go.mod dependencies

* Update pfs import

* Missing update of pfs dependency

* Remove fixed cuelang dependency

* Update codeowners

* Update workspace

* Update Dockerfile

* Missing go.mod codeowner

* Use intermediate kin-openapi dependency to make all workspaces to work

pkg/plugins/auth/models.go

@@ -3,7 +3,7 @@ package auth
 import (
 	"context"
 
-	"github.com/grafana/grafana/pkg/plugins/pfs"
+	"github.com/grafana/grafana/pkg/plugins/codegen/pfs"
 )
 
 type ExternalService struct {