MM-24595 Migrate API handler getChannelMember(s) to be compatible with local mode (#14533)

Co-authored-by: Ibrahim Serdar Acikgoz <serdaracikgoz86@gmail.com>
Co-authored-by: Miguel de la Cruz <miguel@mcrx.me>
Co-authored-by: mattermod <mattermod@users.noreply.github.com>

api4/channel_local.go

@@ -13,6 +13,8 @@ import (
 func (api *API) InitChannelLocal() {
 	api.BaseRoutes.Channels.Handle("", api.ApiLocal(getAllChannels)).Methods("GET")
 	api.BaseRoutes.Channels.Handle("", api.ApiLocal(localCreateChannel)).Methods("POST")
+	api.BaseRoutes.ChannelMember.Handle("", api.ApiLocal(getChannelMember)).Methods("GET")
+	api.BaseRoutes.ChannelMembers.Handle("", api.ApiLocal(getChannelMembers)).Methods("GET")
 }
 
 func localCreateChannel(c *Context, w http.ResponseWriter, r *http.Request) {