Support atomic directory promotion across platforms

internal/fileops/rename_noreplace_other.go

@@ -1,9 +1,16 @@
-//go:build !linux
+//go:build !linux && !darwin && !windows
 
 package fileops
 
-import "fmt"
+import (
+	"fmt"
+	"runtime"
+)
+
+func checkAtomicDirectoryPromotionSupport() error {
+	return fmt.Errorf("%w on %s", ErrAtomicDirectoryPromotionUnsupported, runtime.GOOS)
+}
 
 func renameDirectoryNoReplace(_, _ string) error {
-	return fmt.Errorf("atomic no-replace directory rename is unsupported on this platform")
+	return checkAtomicDirectoryPromotionSupport()
 }