cmd/go: convert TestGoTestWithoutTests to the script framework

Part of converting all tests to script framework to improve
test parallelism.

Updates #36320
Updates #17751

Change-Id: Ibc3cb3823bd1c1b80058076f2c9933dc729447a5
Reviewed-on: https://go-review.googlesource.com/c/go/+/213127
Run-TryBot: Michael Matloob <matloob@golang.org>
Reviewed-by: Jay Conrod <jayconrod@google.com>

src/cmd/go/go_test.go

@@ -5271,16 +5271,6 @@ func TestCDAndGOPATHAreDifferent(t *testing.T) {
 	}
 }
 
-// Issue 26242.
-func TestGoTestWithoutTests(t *testing.T) {
-	tg := testgo(t)
-	defer tg.cleanup()
-	tg.parallel()
-	tg.setenv("GOPATH", filepath.Join(tg.pwd(), "testdata"))
-	tg.run("test", "testnorun")
-	tg.grepStdout(`testnorun\t\[no test files\]`, "do not want test to run")
-}
-
 // Issue 25579.
 func TestGoBuildDashODevNull(t *testing.T) {
 	tooSlow(t)

src/cmd/go/testdata/script/test_no_tests.txt

@@ -0,0 +1,11 @@
+# Tests issue #26242
+
+go test testnorun
+stdout 'testnorun\t\[no test files\]'
+
+-- testnorun/p.go --
+package p
+
+func init() {
+	panic("go test must not link and run test binaries without tests")
+}

src/cmd/go/testdata/src/testnorun/p.go

@@ -1,5 +0,0 @@
-package p
-
-func init() {
-	panic("go test must not link and run test binaries without tests")
-}