Adding bulk deletion endpoint for notifications (#3154)

* Catch DoesNotExist error

* Move notificationtable function to js file

* Fix for custom metadata class

- Previously only worked if a POST or PUT action was available on the endpoint
- So, a ListAPIView endpoint would not actually work!
- Adding in a BulkDelete mixin to a ListAPIView caused failure

* Add unit test to ensure new OPTIONS metadata updates are checked

* Expand functionality of the existing BulkDelete mixin

- Allow deletion by custom filters
- Allow each implementing class to implement custom filters
- Adds more unit testing for BulkDelete mixin class

* Add bulk delete operation for Notification API

- Ensure users can only delete their *own* notifications

* Improve notification tables / buttons / etc

* Adds unit testing for bulk delete of notifications

- Fixed API permissions for notifications list endpoint

* Update BulkDelete operations for the StockItemTestResult table

* Use filters parameter in attachments table to ensure that only correct attachments are deleted

* JS linting

* Fixes for unit tests

InvenTree/templates/attachment_table.html

@@ -3,7 +3,7 @@
 <div id='attachment-buttons'>
     <div class='btn-group' role='group'>
         <div class='btn-group'>
-            <button class='btn btn-primary dropdown-toggle' type='buton' data-bs-toggle='dropdown' title='{% trans "Actions" %}'>
+            <button class='btn btn-primary dropdown-toggle' type='button' data-bs-toggle='dropdown' title='{% trans "Actions" %}'>
                 <span class='fas fa-tools'></span> <span class='caret'></span>
             </button>
             <ul class='dropdown-menu'>