MM-57512: Disable content extraction during import (#26619)

https://mattermost.atlassian.net/browse/MM-57512
```release-note
NONE
```

server/channels/app/post_test.go

@@ -791,7 +791,7 @@ func TestDeletePostWithFileAttachments(t *testing.T) {
 	filename := "test"
 	data := []byte("abcd")
 
-	info1, err := th.App.DoUploadFile(th.Context, time.Date(2007, 2, 4, 1, 2, 3, 4, time.Local), teamID, channelID, userID, filename, data)
+	info1, err := th.App.DoUploadFile(th.Context, time.Date(2007, 2, 4, 1, 2, 3, 4, time.Local), teamID, channelID, userID, filename, data, true)
 	require.Nil(t, err)
 	defer func() {
 		th.App.Srv().Store().FileInfo().PermanentDelete(th.Context, info1.Id)