fix(ci): keep the push suite inside the runner's memory and time budget

Assisted-by: GLM 5.3 Flash

asm/goobj_test.go

@@ -564,6 +564,14 @@ func parseBuildLog(t *testing.T, log []byte, asmFile string) buildLogSteps {
 func substituteAndRelink(t *testing.T, goBin, dir string, st buildLogSteps, outBin string, gasmObj []byte, extraEnv ...string) {
 	t.Helper()
 
+	// The deliberate-run boundary: this path drives a real `go build` and
+	// cmd/link per invocation, minutes-scale work on the small single-core
+	// CI runner.  Under -short (the push pipeline's mode) it skips; the
+	// local test gate and the dispatched workflows run it in full.
+	if testing.Short() {
+		t.Skip("end-to-end go build and link: skipped in -short mode")
+	}
+
 	// Extract the archive, overwrite the assembler's member with the gasm
 	// object and repack (go tool pack has no replace-in-place).
 	membersDir := filepath.Join(dir, "members")
@@ -655,6 +663,9 @@ func substituteAndRelink(t *testing.T, goBin, dir string, st buildLogSteps, outB
 // failed.  The binary is not run: morestack returns to the call site's
 // stack check, which a hand-written caller has none of.
 func TestGOObjectExternalPackageLink(t *testing.T) {
+	if testing.Short() {
+		t.Skip("end-to-end go build and link: skipped in -short mode")
+	}
 	goBin, err := exec.LookPath("go")
 	if err != nil {
 		t.Skip("no Go toolchain available")