podman: podman: Quadlet install --replace non-truncating write retains removed host-access directives

The 'podman quadlet install --replace' command opens the existing destination file with OCREATE|OWRONLY but omits OTRUNC. When the initial reflink copy attempt fails common on non-reflink-capable filesystems including many RHEL default XFS configurations, the fallback in ReflinkOrCopy uses io.Cop...