[MM-25388] Add telemetry for default picture attribute (#14661)

* MM-25388 Add telemetry for default picture attribute

* Rename to isempty

* rename to isnotempty

app/diagnostics.go

@@ -560,6 +560,7 @@ func (a *App) trackConfig() {
 		"isdefault_group_id_attribute":           isDefault(*cfg.LdapSettings.GroupIdAttribute, model.LDAP_SETTINGS_DEFAULT_GROUP_ID_ATTRIBUTE),
 		"isempty_guest_filter":                   isDefault(*cfg.LdapSettings.GuestFilter, ""),
 		"isempty_admin_filter":                   isDefault(*cfg.LdapSettings.AdminFilter, ""),
+		"isnotempty_picture_attribute":           !isDefault(*cfg.LdapSettings.PictureAttribute, ""),
 	})
 
 	a.SendDiagnostic(TRACK_CONFIG_COMPLIANCE, map[string]interface{}{