Merge branch '351657-add-comments-to-destination-packages' into 'master'

Add code comments to destination packages

See merge request gitlab-org/gitlab!82977

workhorse/internal/upload/destination/destination.go

+// The destination package handles uploading to a specific destination (delegates
+// to filestore or objectstore packages) based on options from the pre-authorization
+// API and finalizing the upload.
 package destination
 
 import (

workhorse/internal/upload/destination/filestore/filestore.go

+// The filestore package has a consumer specific to uploading to local disk storage.
 package filestore
 
 import (

workhorse/internal/upload/destination/objectstore/doc.go

+// The objectstore package consists of a number of consumers specific to uploading
+// to object storage providers that are S3 compatible (e.g. AWS S3, GCP, Azure).
+package objectstore