Create new class ImageCompressor

* Methods from AttachmentCreationTask have been moved into it:
  * compressImage()
  * createBitmap()
* It is availabe via AttachmentModule
1 job for 1846-refactor-image-compression-for-reuse3 in 9 minutes and 57 seconds (queued for 1 minute and 2 seconds)
Status Job ID Name Coverage
  Test
passed #6673
test

00:09:57