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

* Use request.CTX instead of *request.Context

* Fix tests

server/channels/app/slashcommands/command_expand_collapse.go

@@ -55,11 +55,11 @@ func (*CollapseProvider) GetCommand(a *app.App, T i18n.TranslateFunc) *model.Com
 	}
 }
 
-func (*ExpandProvider) DoCommand(a *app.App, c *request.Context, args *model.CommandArgs, message string) *model.CommandResponse {
+func (*ExpandProvider) DoCommand(a *app.App, c request.CTX, args *model.CommandArgs, message string) *model.CommandResponse {
 	return setCollapsePreference(a, args, false)
 }
 
-func (*CollapseProvider) DoCommand(a *app.App, c *request.Context, args *model.CommandArgs, message string) *model.CommandResponse {
+func (*CollapseProvider) DoCommand(a *app.App, c request.CTX, args *model.CommandArgs, message string) *model.CommandResponse {
 	return setCollapsePreference(a, args, true)
 }