RBAC: remove redundant role name field from plugin role registrations (#58166)

* RBAC: Remove name from role registration

* Inline accesscontrol service

* test fix

* use fmt

Co-Authored-By: marefr <marcus.efraimsson@gmail.com>

Co-authored-by: marefr <marcus.efraimsson@gmail.com>

pkg/coremodel/pluginmeta/coremodel.cue

@@ -158,7 +158,7 @@ seqs: [
 				// Example: the role 'Schedules Reader' bundles permissions to view all schedules of the plugin.
 				#Role: {
 					name: string,
-					displayName: string,
+					name: =~"^([A-Z][0-9A-Za-z ]+)$"
 					description: string,
 					permissions: [...#Permission]
 				}

pkg/coremodel/pluginmeta/pluginmeta_gen.go

@@ -537,7 +537,6 @@ type ReleaseState string
 // Equivalent Go types at stable import paths are provided in https://github.com/grafana/grok.
 type Role struct {
 	Description string `json:"description"`
-	DisplayName string `json:"displayName"`
 	Name        string `json:"name"`
 	Permissions []struct {
 		Action string  `json:"action"`
@@ -562,7 +561,6 @@ type RoleRegistration struct {
 	// RBAC role definition to bundle related RBAC permissions on the plugin.
 	Role struct {
 		Description string `json:"description"`
-		DisplayName string `json:"displayName"`
 		Name        string `json:"name"`
 		Permissions []struct {
 			Action string  `json:"action"`