[MM-56660] When deleting a draft , the modal delete button does not have focus (#26132)

* delete draft confirmation button autofocus

* removed css clases for no visual changes

* updated snapshots for test

---------

Co-authored-by: Mattermost Build <build@mattermost.com>

webapp/channels/src/components/drafts/draft_actions/__snapshots__/delete_draft_modal.test.tsx.snap

@@ -4,6 +4,7 @@ exports[`components/drafts/draft_actions/delete_draft_modal should have called o
 <GenericModal
   autoCloseOnCancelButton={true}
   autoCloseOnConfirmButton={true}
+  autoFocusConfirmButton={true}
   bodyPadding={true}
   compassDesign={true}
   confirmButtonText="Yes, delete"
@@ -46,6 +47,7 @@ exports[`components/drafts/draft_actions/delete_draft_modal should have called o
 <GenericModal
   autoCloseOnCancelButton={true}
   autoCloseOnConfirmButton={true}
+  autoFocusConfirmButton={true}
   bodyPadding={true}
   compassDesign={true}
   confirmButtonText="Yes, delete"

webapp/channels/src/components/drafts/draft_actions/delete_draft_modal.tsx

@@ -49,6 +49,7 @@ function DeleteDraftModal({
             onExited={onExited}
             compassDesign={true}
             isDeleteModal={true}
+            autoFocusConfirmButton={true}
         >
             {message}
         </GenericModal>