login: Clarify semantics of alternative-authentication-methods divider

Fixes #1961.

Author: MritunjayTiwari14

assets/l10n/app_en.arb

@@ -832,6 +832,10 @@
   "@loginMethodDivider": {
     "description": "Text on the divider between the username/password form and the third-party login options. Uppercase (for languages with letter case)."
   },
+  "loginMethodDividerSemanticLabel": "Log-in alternatives",
+  "@loginMethodDividerSemanticLabel": {
+    "description": "Semantic label for divider between the username/password form and the third-party login options."
+  },
   "signInWithFoo": "Sign in with {method}",
   "@signInWithFoo": {
     "description": "Button to use {method} to sign in to the app.",

lib/generated/l10n/zulip_localizations.dart

@@ -1269,6 +1269,12 @@ abstract class ZulipLocalizations {
   /// **'OR'**
   String get loginMethodDivider;
 
+  /// Semantic label for divider between the username/password form and the third-party login options.
+  ///
+  /// In en, this message translates to:
+  /// **'Log-in alternatives'**
+  String get loginMethodDividerSemanticLabel;
+
   /// Button to use {method} to sign in to the app.
   ///
   /// In en, this message translates to:

lib/generated/l10n/zulip_localizations_ar.dart

@@ -690,6 +690,9 @@ class ZulipLocalizationsAr extends ZulipLocalizations {
   @override
   String get loginMethodDivider => 'OR';
 
+  @override
+  String get loginMethodDividerSemanticLabel => 'Log-in alternatives';
+
   @override
   String signInWithFoo(String method) {
     return 'Sign in with $method';

lib/generated/l10n/zulip_localizations_de.dart

@@ -709,6 +709,9 @@ class ZulipLocalizationsDe extends ZulipLocalizations {
   @override
   String get loginMethodDivider => 'ODER';
 
+  @override
+  String get loginMethodDividerSemanticLabel => 'Log-in alternatives';
+
   @override
   String signInWithFoo(String method) {
     return 'Anmelden mit $method';

lib/generated/l10n/zulip_localizations_el.dart

@@ -690,6 +690,9 @@ class ZulipLocalizationsEl extends ZulipLocalizations {
   @override
   String get loginMethodDivider => 'OR';
 
+  @override
+  String get loginMethodDividerSemanticLabel => 'Log-in alternatives';
+
   @override
   String signInWithFoo(String method) {
     return 'Sign in with $method';

lib/generated/l10n/zulip_localizations_en.dart

@@ -690,6 +690,9 @@ class ZulipLocalizationsEn extends ZulipLocalizations {
   @override
   String get loginMethodDivider => 'OR';
 
+  @override
+  String get loginMethodDividerSemanticLabel => 'Log-in alternatives';
+
   @override
   String signInWithFoo(String method) {
     return 'Sign in with $method';

lib/generated/l10n/zulip_localizations_es.dart

@@ -690,6 +690,9 @@ class ZulipLocalizationsEs extends ZulipLocalizations {
   @override
   String get loginMethodDivider => 'OR';
 
+  @override
+  String get loginMethodDividerSemanticLabel => 'Log-in alternatives';
+
   @override
   String signInWithFoo(String method) {
     return 'Sign in with $method';

lib/generated/l10n/zulip_localizations_fr.dart

@@ -706,6 +706,9 @@ class ZulipLocalizationsFr extends ZulipLocalizations {
   @override
   String get loginMethodDivider => 'OR';
 
+  @override
+  String get loginMethodDividerSemanticLabel => 'Log-in alternatives';
+
   @override
   String signInWithFoo(String method) {
     return 'Sign in with $method';

lib/generated/l10n/zulip_localizations_he.dart

@@ -690,6 +690,9 @@ class ZulipLocalizationsHe extends ZulipLocalizations {
   @override
   String get loginMethodDivider => 'OR';
 
+  @override
+  String get loginMethodDividerSemanticLabel => 'Log-in alternatives';
+
   @override
   String signInWithFoo(String method) {
     return 'Sign in with $method';

lib/generated/l10n/zulip_localizations_hu.dart

@@ -690,6 +690,9 @@ class ZulipLocalizationsHu extends ZulipLocalizations {
   @override
   String get loginMethodDivider => 'OR';
 
+  @override
+  String get loginMethodDividerSemanticLabel => 'Log-in alternatives';
+
   @override
   String signInWithFoo(String method) {
     return 'Sign in with $method';