UPSTREAM: <drop>: use go.1.20

test/e2e/framework/ginkgowrapper.go

@@ -300,7 +300,7 @@ func validateText(location types.CodeLocation, text string, labels []string) {
 		}
 		// Strip square brackets.
 		tag = tag[1 : len(tag)-1]
-		if slices.Contains(labels, tag) {
+		if slicesContains(labels, tag) {
 			// Okay, was also set as label.
 			continue
 		}
@@ -566,3 +566,16 @@ func slicesEqual[S ~[]E, E comparable](s1, s2 S) bool {
 	}
 	return true
 }
+
+func slicesContains[S ~[]E, E comparable](s S, v E) bool {
+	return slicesIndex(s, v) >= 0
+}
+
+func slicesIndex[S ~[]E, E comparable](s S, v E) int {
+	for i := range s {
+		if v == s[i] {
+			return i
+		}
+	}
+	return -1
+}