[release-branch.go1.18] encoding/xml: skip TestCVE202230633 for short…

… tests

TestCVE202230633 uses a bunch of memory, and the input cannot be
feasibly reduced while maintaining the behavior hasn't regressed. This
test could be reasonably removed, but I'd rather keep it around if we
can.

Updates #53814.
Fixes #54128.

Change-Id: Ie8b3f306efd20b2d9c0fb73122c26351a55694c4
Reviewed-on: https://go-review.googlesource.com/c/go/+/417655
Run-TryBot: Roland Shoemaker <[email protected]>
TryBot-Result: Gopher Robot <[email protected]>
Reviewed-by: Bryan Mills <[email protected]>
(cherry picked from commit 783ff7d)
Reviewed-on: https://go-review.googlesource.com/c/go/+/421094
Reviewed-by: Cherry Mui <[email protected]>
Run-TryBot: Dmitri Shuralyov <[email protected]>
Reviewed-by: Dmitri Shuralyov <[email protected]>

src/encoding/xml/read_test.go

@@ -9,7 +9,6 @@ import (
 	"errors"
 	"io"
 	"reflect"
-	"runtime"
 	"strings"
 	"testing"
 	"time"
@@ -1084,8 +1083,8 @@ func TestUnmarshalWhitespaceAttrs(t *testing.T) {
 }
 
 func TestCVE202230633(t *testing.T) {
-	if runtime.GOARCH == "wasm" {
-		t.Skip("causes memory exhaustion on js/wasm")
+	if testing.Short() {
+		t.Skip("test requires significant memory")
 	}
 	defer func() {
 		p := recover()