Use request.CTX instead of *request.Context (#24877)

* Use request.CTX instead of *request.Context

* Fix tests

server/channels/app/slashcommands/command_code.go

@@ -37,7 +37,7 @@ func (*CodeProvider) GetCommand(a *app.App, T i18n.TranslateFunc) *model.Command
 	}
 }
 
-func (*CodeProvider) DoCommand(a *app.App, c *request.Context, args *model.CommandArgs, message string) *model.CommandResponse {
+func (*CodeProvider) DoCommand(a *app.App, c request.CTX, args *model.CommandArgs, message string) *model.CommandResponse {
 	if message == "" {
 		return &model.CommandResponse{Text: args.T("api.command_code.message.app_error"), ResponseType: model.CommandResponseTypeEphemeral}
 	}