MM-14712 - Add support for signing SAML requests (#11081)

* SAML Request signing added
* added telemetry for signrequest flag

app/diagnostics.go

@@ -499,6 +499,7 @@ func (a *App) trackConfig() {
 		"enable_sync_with_ldap_include_auth":  *cfg.SamlSettings.EnableSyncWithLdapIncludeAuth,
 		"verify":                              *cfg.SamlSettings.Verify,
 		"encrypt":                             *cfg.SamlSettings.Encrypt,
+		"sign_request":                        *cfg.SamlSettings.SignRequest,
 		"isdefault_scoping_idp_provider_id":   isDefault(*cfg.SamlSettings.ScopingIDPProviderId, ""),
 		"isdefault_scoping_idp_name":          isDefault(*cfg.SamlSettings.ScopingIDPName, ""),
 		"isdefault_id_attribute":              isDefault(*cfg.SamlSettings.IdAttribute, model.SAML_SETTINGS_DEFAULT_ID_ATTRIBUTE),