CloudMigrations: Add support for migration of plugin resources (#95612)

* start plugins migration

* more plugin work

* add warning

* fakepluginsettings test

* tests get plugins

* lint

* load logos

* go lint

* get all plugins once

* locales

* josh suggestion to inject query in rtk

* more plugin filters

* remove datasource warning

* access control for plugins

* remove unused method

* lint

* use gcom list

pkg/services/cloudmigration/api/dtos.go

@@ -131,6 +131,7 @@ const (
 	NotificationPolicyType   MigrateDataType = "NOTIFICATION_POLICY"
 	NotificationTemplateType MigrateDataType = "NOTIFICATION_TEMPLATE"
 	MuteTimingType           MigrateDataType = "MUTE_TIMING"
+	PluginDataType           MigrateDataType = "PLUGIN"
 )
 
 // swagger:enum ItemStatus
@@ -158,7 +159,6 @@ const (
 	ErrResourceConflict           ItemErrorCode = "RESOURCE_CONFLICT"
 	ErrUnexpectedStatus           ItemErrorCode = "UNEXPECTED_STATUS_CODE"
 	ErrInternalServiceError       ItemErrorCode = "INTERNAL_SERVICE_ERROR"
-	ErrOnlyCoreDataSources        ItemErrorCode = "ONLY_CORE_DATA_SOURCES"
 	ErrGeneric                    ItemErrorCode = "GENERIC_ERROR"
 )