[MM-26812] Add support for resumable file uploads (#15252)

* Implement AppendFile for FileBackend

* Split test into subtests

* [MM-26812] Add support for resumable file uploads (#15252)

* Implement UploadSession

* Implement UploadSessionStore

* Add error strings

* Implement resumable file uploads

* Add UploadType

* Fix retry layer tests

* Regenerate store layers

* Fix store error handling

* Use base for filename

* Prevent concurrent uploads on the same upload session

* Fix erroneus error string

* Improve error handling

Co-authored-by: Mattermod <mattermod@users.noreply.github.com>

* Fix translations

Co-authored-by: Mattermod <mattermod@users.noreply.github.com>

store/store.go

@@ -41,6 +41,7 @@ type Store interface {
 	Emoji() EmojiStore
 	Status() StatusStore
 	FileInfo() FileInfoStore
+	UploadSession() UploadSessionStore
 	Reaction() ReactionStore
 	Role() RoleStore
 	Scheme() SchemeStore
@@ -549,6 +550,14 @@ type FileInfoStore interface {
 	ClearCaches()
 }
 
+type UploadSessionStore interface {
+	Save(session *model.UploadSession) (*model.UploadSession, error)
+	Update(session *model.UploadSession) error
+	Get(id string) (*model.UploadSession, error)
+	GetForUser(userId string) ([]*model.UploadSession, error)
+	Delete(id string) error
+}
+
 type ReactionStore interface {
 	Save(reaction *model.Reaction) (*model.Reaction, error)
 	Delete(reaction *model.Reaction) (*model.Reaction, error)