MM-56083 Add PatchMultipleMembersNotifyProps plugin API (#25690)

* Add ChannelStore.UpdateMultipleMembersNotifyProps

* Make UpdateMultipleMembersNotifyProps return updated values from the DB

* Add UpdateChannelMembersNotifications plugin API

* Extract i18n

* Fix style

* Make layers

* Change to PatchMultipleMembersNotifyProps

* Add limit to PatchChannelMembersNotifyProps

* Add additional unit tests

* Address feedback

* Lowercase decodeJSON

* Have PatchMultipleMembersNotifyProps update LastUpdateAt

* Fix tests that relied on unreliable return order

* Fix i18n

server/public/plugin/api.go

@@ -600,6 +600,15 @@ type API interface {
 	// Minimum server version: 5.2
 	UpdateChannelMemberNotifications(channelId, userID string, notifications map[string]string) (*model.ChannelMember, *model.AppError)
 
+	// PatchChannelMembersNotifications updates the notification properties for multiple channel members.
+	// Other changes made to the channel memberships will be ignored. A maximum of 200 members can be
+	// updated at once.
+	//
+	// @tag Channel
+	// @tag User
+	// Minimum server version: 9.5
+	PatchChannelMembersNotifications(members []*model.ChannelMemberIdentifier, notifyProps map[string]string) *model.AppError
+
 	// GetGroup gets a group by ID.
 	//
 	// @tag Group