emails: Set correct language for email in send_email_to_admins.

Previously the emails were translated to the default_language of
admin[0] in build_email function. Now we use realm.default_language
instead.

zerver/lib/actions.py

@@ -5920,10 +5920,12 @@ def do_send_realm_reactivation_email(realm: Realm) -> None:
     context = {'confirmation_url': url,
                'realm_uri': realm.uri,
                'realm_name': realm.name}
+    language = realm.default_language
     send_email_to_admins(
         'zerver/emails/realm_reactivation', realm,
         from_address=FromAddress.tokenized_no_reply_address(),
-        from_name="Zulip Account Security", context=context)
+        from_name=FromAddress.security_email_from_name(language=language),
+        language=language, context=context)
 
 def get_zoom_video_call_url(realm: Realm) -> str:
     response = request_zoom_video_call_url(

zerver/lib/send_email.py

@@ -197,11 +197,12 @@ def send_future_email(template_prefix: str, realm: Realm, to_user_ids: Optional[
         raise e
 
 def send_email_to_admins(template_prefix: str, realm: Realm, from_name: Optional[str]=None,
-                         from_address: Optional[str]=None, context: Dict[str, Any]={}) -> None:
+                         from_address: Optional[str]=None, language: Optional[str]=None,
+                         context: Dict[str, Any]={}) -> None:
     admins = realm.get_human_admin_users()
     admin_user_ids = [admin.id for admin in admins]
     send_email(template_prefix, to_user_ids=admin_user_ids, from_name=from_name,
-               from_address=from_address, context=context)
+               from_address=from_address, language=language, context=context)
 
 def clear_scheduled_invitation_emails(email: str) -> None:
     """Unlike most scheduled emails, invitation emails don't have an