[MM-25648] api4: add user/bot convert endpoints (#14877)

* api4: add user/bot convert endpoints

* api4: add convert user/bot to local mode

* api4: fix linting issues

* api4/bot: reflect review comments

* api4: update convert user endpoint paths

* remove shadow decl

* fix translation problems

app/app_iface.go

@@ -61,6 +61,8 @@ type AppIface interface {
 	ChannelMembersMinusGroupMembers(channelID string, groupIDs []string, page, perPage int) ([]*model.UserWithGroups, int64, *model.AppError)
 	// ClientConfigWithComputed gets the configuration in a format suitable for sending to the client.
 	ClientConfigWithComputed() map[string]string
+	// ConvertBotToUser converts a bot to user.
+	ConvertBotToUser(bot *model.Bot, userPatch *model.UserPatch, sysadmin bool) (*model.User, *model.AppError)
 	// ConvertUserToBot converts a user to bot.
 	ConvertUserToBot(user *model.User) (*model.Bot, *model.AppError)
 	// CreateBot creates the given bot and corresponding user.