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/codegen/util_ts.go

@@ -13,7 +13,7 @@ import (
 // indicates the import path should be dropped in the conversion to TS. Imports
 // not present in the list are not allowed, and code generation will fail.
 var importMap = map[string]string{
-	"github.com/grafana/grafana/pkg/plugins/pfs":                    "",
+	"github.com/grafana/grafana/pkg/plugins/codegen/pfs":            "",
 	"github.com/grafana/grafana/packages/grafana-schema/src/common": "@grafana/schema",
 }
 
@@ -35,7 +35,7 @@ func init() {
 // Grafana kind definitions.
 func PermittedCUEImports() []string {
 	return []string{
-		"github.com/grafana/grafana/pkg/plugins/pfs",
+		"github.com/grafana/grafana/pkg/plugins/codegen/pfs",
 		"github.com/grafana/grafana/packages/grafana-schema/src/common",
 	}
 }