cmd/golangorg: move test case that needs internet to live.txt

One test case added in CL 388016 depends on production resources,
specifically the snippet https://play.golang.org/p/MAohLsrz7JQ.go
served by the production instance of the Go playground.

This would be caught by TryBots where internet access is disabled,
but that didn't happen due to golang/go#51444.

Updates golang/go#51181.
Fixes golang/go#51439.

Change-Id: I4f1c5ea1a6ccad9ae4e5cbb749e3dee0b26731b5
Reviewed-on: https://go-review.googlesource.com/c/website/+/389394
Reviewed-by: Bryan Mills <bcmills@google.com>
Reviewed-by: Jamal Carvalho <jamalcarvalho@google.com>
Trust: Dmitri Shuralyov <dmitshur@google.com>

cmd/golangorg/testdata/godev.txt

@@ -43,19 +43,13 @@ GET https://go.dev/play/p/asdfasdf
 body contains The Go Playground
 body contains About the Playground
 
-GET https://go.dev/play/p/MAohLsrz7JQ.go
-header Content-Type == text/plain; charset=utf-8
-body !contains The Go Playground
-body !contains About the Playground
-body contains Hello, 世界
-
 GET https://golang.google.cn/play/p/asdfasdf
 code == 500
 body contains Sorry, but shared playground snippets are not visible in China.
 body !contains The Go Playground
 body !contains About the Playground
 
-GET https://golang.google.cn/play/p/MAohLsrz7JQ.go
+GET https://golang.google.cn/play/p/asdfasdf.go
 code == 500
 body contains Sorry, but shared playground snippets are not visible in China.
 

cmd/golangorg/testdata/live.txt

@@ -56,3 +56,9 @@ POST https://go.dev/_/share
 postbody
 	package main
 body !contains UA-
+
+GET https://go.dev/play/p/MAohLsrz7JQ.go
+header Content-Type == text/plain; charset=utf-8
+body !contains The Go Playground
+body !contains About the Playground
+body contains Hello, 世界