Hide account deactivation for externally managed accounts (#11445)

* util for account url

* test cases

* disable multi session selection on device list

* remove sign out all from context menus when oidc-aware

* comment

* remove unused param

* typo

* dont show account deactivation for externally managed accounts

* Update snapshots - field ID changed

---------

Co-authored-by: Andy Balaam <andy.balaam@matrix.org>

src/components/views/settings/tabs/user/GeneralUserSettingsTab.tsx

@@ -527,7 +527,8 @@ export default class GeneralUserSettingsTab extends React.Component<IProps, ISta
         const supportsMultiLanguageSpellCheck = plaf?.supportsSpellCheckSettings();
 
         let accountManagementSection: JSX.Element | undefined;
-        if (SettingsStore.getValue(UIFeature.Deactivate)) {
+        const isAccountManagedExternally = !!this.state.externalAccountManagementUrl;
+        if (SettingsStore.getValue(UIFeature.Deactivate) && !isAccountManagedExternally) {
             accountManagementSection = this.renderManagementSection();
         }