revert: don't use cmp.Or as its v1.22 only

This reverts commit 8f4a255.

internal/output/result.go

@@ -1,7 +1,6 @@
 package output
 
 import (
-	"cmp"
 	"encoding/json"
 	"slices"
 	"strings"
@@ -24,11 +23,17 @@ func (pss *pkgSourceSet) StableKeys() []pkgWithSource {
 
 	slices.SortFunc(pkgWithSrcKeys, func(a, b pkgWithSource) int {
 		// compare based on each field in descending priority
-		return cmp.Or(
-			strings.Compare(a.Source.Path, b.Source.Path),
-			strings.Compare(a.Package.Name, b.Package.Name),
-			strings.Compare(a.Package.Version, b.Package.Version),
-		)
+		for _, fn := range []func() int{
+			func() int { return strings.Compare(a.Source.Path, b.Source.Path) },
+			func() int { return strings.Compare(a.Package.Name, b.Package.Name) },
+			func() int { return strings.Compare(a.Package.Version, b.Package.Version) },
+		} {
+			if r := fn(); r != 0 {
+				return r
+			}
+		}
+
+		return 0
 	})
 
 	return pkgWithSrcKeys