[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/sqlstore/supplier.go

@@ -89,6 +89,7 @@ type SqlSupplierStores struct {
 	emoji                store.EmojiStore
 	status               store.StatusStore
 	fileInfo             store.FileInfoStore
+	uploadSession        store.UploadSessionStore
 	reaction             store.ReactionStore
 	job                  store.JobStore
 	userAccessToken      store.UserAccessTokenStore
@@ -157,6 +158,7 @@ func NewSqlSupplier(settings model.SqlSettings, metrics einterfaces.MetricsInter
 	supplier.stores.emoji = newSqlEmojiStore(supplier, metrics)
 	supplier.stores.status = newSqlStatusStore(supplier)
 	supplier.stores.fileInfo = newSqlFileInfoStore(supplier, metrics)
+	supplier.stores.uploadSession = newSqlUploadSessionStore(supplier)
 	supplier.stores.job = newSqlJobStore(supplier)
 	supplier.stores.userAccessToken = newSqlUserAccessTokenStore(supplier)
 	supplier.stores.channelMemberHistory = newSqlChannelMemberHistoryStore(supplier)
@@ -202,6 +204,7 @@ func NewSqlSupplier(settings model.SqlSettings, metrics einterfaces.MetricsInter
 	supplier.stores.emoji.(*SqlEmojiStore).createIndexesIfNotExists()
 	supplier.stores.status.(*SqlStatusStore).createIndexesIfNotExists()
 	supplier.stores.fileInfo.(*SqlFileInfoStore).createIndexesIfNotExists()
+	supplier.stores.uploadSession.(*SqlUploadSessionStore).createIndexesIfNotExists()
 	supplier.stores.job.(*SqlJobStore).createIndexesIfNotExists()
 	supplier.stores.userAccessToken.(*SqlUserAccessTokenStore).createIndexesIfNotExists()
 	supplier.stores.plugin.(*SqlPluginStore).createIndexesIfNotExists()
@@ -1134,6 +1137,10 @@ func (ss *SqlSupplier) FileInfo() store.FileInfoStore {
 	return ss.stores.fileInfo
 }
 
+func (ss *SqlSupplier) UploadSession() store.UploadSessionStore {
+	return ss.stores.uploadSession
+}
+
 func (ss *SqlSupplier) Reaction() store.ReactionStore {
 	return ss.stores.reaction
 }