Plugins: Display plugin permissions required (#78355)

* Add definition of external service registration

* Add style and tables for permissions needed

* Add external service registration to local without counterpart

* Add feature toggle check

* Add feature flag check in the backend as well

* Add the disclaimer for permissions

---------

Co-authored-by: Gabriel MABILLE <gabriel.mabille@grafana.com>

pkg/api/dtos/plugins.go

@@ -2,6 +2,7 @@ package dtos
 
 import (
 	"github.com/grafana/grafana/pkg/plugins"
+	"github.com/grafana/grafana/pkg/plugins/plugindef"
 	"github.com/grafana/grafana/pkg/services/accesscontrol"
 )
 
@@ -47,6 +48,7 @@ type PluginListItem struct {
 	SignatureOrg    string                  `json:"signatureOrg"`
 	AccessControl   accesscontrol.Metadata  `json:"accessControl,omitempty"`
 	AngularDetected bool                    `json:"angularDetected"`
+	IAM             *plugindef.IAM          `json:"iam,omitempty"`
 }
 
 type PluginList []PluginListItem