Schemas: Refactor plugin's metadata (#83696)

* Remove kinds verification for kind-registry

* Read plugin's json information with json library instead of use thema binding

* Remove grafanaplugin unification

* Don't use kindsys for extract the slot name

* Fix IsGroup

* Remove all plugindef generation

* Refactor schema interfaces

* Pushed this change from a different branch by mistake...

* Create small plugin definition structure adding additional information for plugins registration

* Add some validation checks

* Delete unused code

* Fix imports lint

pkg/services/pluginsintegration/pluginconfig/envvars_test.go

@@ -17,7 +17,7 @@ import (
 	"github.com/grafana/grafana/pkg/plugins/config"
 	"github.com/grafana/grafana/pkg/plugins/envvars"
 	"github.com/grafana/grafana/pkg/plugins/manager/fakes"
-	"github.com/grafana/grafana/pkg/plugins/plugindef"
+	"github.com/grafana/grafana/pkg/plugins/pfs"
 	"github.com/grafana/grafana/pkg/services/featuremgmt"
 	"github.com/grafana/grafana/pkg/setting"
 )
@@ -590,7 +590,7 @@ func TestPluginEnvVarsProvider_authEnvVars(t *testing.T) {
 		p := &plugins.Plugin{
 			JSONData: plugins.JSONData{
 				ID:  "test",
-				IAM: &plugindef.IAM{},
+				IAM: &pfs.IAM{},
 			},
 			ExternalService: &auth.ExternalService{
 				ClientID:     "clientID",