Image/OVF Import

• Add the ability to write to a read-only windows host file (#1629)
• Add support for SLES 15.0 (#1636)

OVF Import

• Fixed user-provided tags not being applied to final instance (#1653)

Image export

• Support -source_disk_snapshot flag on gce_vm_image_export cli tool (#1627)

Image Import/export

• Replace 'google.com' with 'elgoog.com' in bucket names to avoid GCS naming restriction (#1617)

Daisy

• Adding Alpha API support to the image create/deprecate processes. Updated dependencies to latest. (#1641)
• cleanerupper: add OSPolicyAssignments and staging osconfig resources (#1609)
• Added support for deleting firewalls (#1654)

Image Build

• Adding image rollout policy support to GCE_Image_Publish (#1647)
• Fix freebsd 13 family. (#1602)
• Fix RHEL byos build. (#1615)
• Add nmap to packages for Debian dev build. (#1605)
• Rocky Linux 8 (RC) build. (#1621)
• Clean up dnf cache completely on el8 (#1642)
• Add gve driver for bare metal. (#1645)
• Add GVNIC flag to supported OS's. (#1658)
• Always install EPEL for EL8 bare metal. (#1646)
• Change licensing string for Windows Server 2019 Core BYOL workflow from SPLA to BYOL. (#1649)
• Fix endpoint var. (#1656)

All changes (including test related): v20210414...619d963