feat: Ability to delete account for administrators (#1874)

## Description

Add account delete option in the user account settings.

Fixes #1555 

## Type of change

- [ ] New feature (non-breaking change which adds functionality)


![image](https://user-images.githubusercontent.com/40784971/110349673-edcc5200-8058-11eb-8ded-a31d15aa0759.png)

![image](https://user-images.githubusercontent.com/40784971/110349778-0c324d80-8059-11eb-9291-abfbffedde5e.png)


## Checklist:

- [ ] My code follows the style guidelines of this project
- [ ] I have performed a self-review of my own code
- [ ] I have commented on my code, particularly in hard-to-understand
areas
- [ ] I have made corresponding changes to the documentation
- [ ] My changes generate no new warnings
- [ ] I have added tests that prove my fix is effective or that my
feature works
- [ ] New and existing unit tests pass locally with my changes
- [ ] Any dependent changes have been merged and published in downstream
modules

---------

Co-authored-by: Sojan Jose <sojan@pepalo.com>
Co-authored-by: Sojan Jose <sojan.official@gmail.com>
Co-authored-by: Muhsin Keloth <muhsinkeramam@gmail.com>

app/jobs/account/contacts_export_job.rb

@@ -51,7 +51,7 @@ class Account::ContactsExportJob < ApplicationJob
 
   def send_mail
     file_url = account_contact_export_url
-    mailer = AdministratorNotifications::ChannelNotificationsMailer.with(account: @account)
+    mailer = AdministratorNotifications::AccountNotificationMailer.with(account: @account)
     mailer.contact_export_complete(file_url, @account_user.email)&.deliver_later
   end
 

app/jobs/data_import_job.rb

@@ -93,10 +93,10 @@ class DataImportJob < ApplicationJob
   end
 
   def send_import_notification_to_admin
-    AdministratorNotifications::ChannelNotificationsMailer.with(account: @data_import.account).contact_import_complete(@data_import).deliver_later
+    AdministratorNotifications::AccountNotificationMailer.with(account: @data_import.account).contact_import_complete(@data_import).deliver_later
   end
 
   def send_import_failed_notification_to_admin
-    AdministratorNotifications::ChannelNotificationsMailer.with(account: @data_import.account).contact_import_failed.deliver_later
+    AdministratorNotifications::AccountNotificationMailer.with(account: @data_import.account).contact_import_failed.deliver_later
   end
 end