[GH-25484] Fix draft removal on post deletion (#25715)

* [GH-25484] Fix draft removal on post deletion

* [GH-25484] Add batch migration to remove orphan drafts

* [GH-25484] Fix tests of migration and draft store

* [GH-25484] Remove translation file changes.

* [GH-25484] Remove translation file changes.

---------

Co-authored-by: Devin Binnie <52460000+devinbinnie@users.noreply.github.com>
Co-authored-by: Mattermost Build <build@mattermost.com>
Co-authored-by: Harrison Healey <harrisonmhealey@gmail.com>

server/channels/store/timerlayer/timerlayer.go

@@ -3101,6 +3101,22 @@ func (s *TimerLayerDraftStore) Delete(userID string, channelID string, rootID st
 	return err
 }
 
+func (s *TimerLayerDraftStore) DeleteDraftsAssociatedWithPost(channelID string, rootID string) error {
+	start := time.Now()
+
+	err := s.DraftStore.DeleteDraftsAssociatedWithPost(channelID, rootID)
+
+	elapsed := float64(time.Since(start)) / float64(time.Second)
+	if s.Root.Metrics != nil {
+		success := "false"
+		if err == nil {
+			success = "true"
+		}
+		s.Root.Metrics.ObserveStoreMethodDuration("DraftStore.DeleteDraftsAssociatedWithPost", success, elapsed)
+	}
+	return err
+}
+
 func (s *TimerLayerDraftStore) DeleteEmptyDraftsByCreateAtAndUserId(createAt int64, userId string) error {
 	start := time.Now()
 
@@ -3117,6 +3133,22 @@ func (s *TimerLayerDraftStore) DeleteEmptyDraftsByCreateAtAndUserId(createAt int
 	return err
 }
 
+func (s *TimerLayerDraftStore) DeleteOrphanDraftsByCreateAtAndUserId(createAt int64, userId string) error {
+	start := time.Now()
+
+	err := s.DraftStore.DeleteOrphanDraftsByCreateAtAndUserId(createAt, userId)
+
+	elapsed := float64(time.Since(start)) / float64(time.Second)
+	if s.Root.Metrics != nil {
+		success := "false"
+		if err == nil {
+			success = "true"
+		}
+		s.Root.Metrics.ObserveStoreMethodDuration("DraftStore.DeleteOrphanDraftsByCreateAtAndUserId", success, elapsed)
+	}
+	return err
+}
+
 func (s *TimerLayerDraftStore) Get(userID string, channelID string, rootID string, includeDeleted bool) (*model.Draft, error) {
 	start := time.Now()