mkosi v27

• Debug output (with --debug) will now show the duration of all steps.
• When booting an image it is always registered with user session machined instance.
• gzip compressed outputs have been made reproducible.
• Generate locales configured in /etc/locale.gen.
• PORTABLE_PREFIXES= can be set via Environment=.
• The special value default is now understood for Initrds=, so that it can be used in conjunction with
  custom initrds.
• Plugins for DNF can be configured via the environment variables MKOSI_DNF_DISABLE_PLUGINS and
  MKOSI_DNF_ENABLE_PLUGINS. This is meant for advanced use cases and is not supported further.
• A new option MakeScriptsExecutable= has been added to make scripts, that are not executable, executable
  instead of exiting with an error.
• A new option OutputSize= has been added to resize output images to that size after creation.
• Two new options OciLabels= and OciAnnotations= have been added to support adding custom labels and
  annotations for images using the OCI output.
• Default initrds are no longer built by default for images using the directory output.
• All cached images are removed when repository metadata will be synced to avoid partial upgrade scenarios.
• When booting images the hostname is no longer set via the kernel command line so as not to overwrite the
  hostname set via other means in the image.
• Support for using systemd-nsresourced's foreign UID range has been added for directory images via the new
  ForeignUIDRange=. This is now the only supported way for booting directory images unprivileged. Building
  images unprivileged without a sufficiently new systemd-nsresourced is still supported.
• If a mkosi/ directory exists and no output location is configured, the .mkosi-private will be put there.
• LocalMirror= can now be set for tools trees.
• A new setting DriveType= has been added to configures the disk type to use for the root disk when booting
  a virtual machine.
• Four new settings ElTorito=, ElToritoSystem=, ElToritoVolume=, and ElToritoPublisher= for use with
  systemd-repart's El Torito support have been added.
• mkosi box does not tint the background by itself anymore.
• The GitHub integration tests have been made runnable locally.
• Support for distribution-built UKIs have been fixed and they are picked up as
  /usr/lib/modules/<kver>/vmlinuz*.efi if a signed bootloader or UnifiedKernelImages=signed is requested.
• The update-grub trigger of APK is disabled for postmarketOS if /etc/update-grub.conf does not exist. If
  you define the file yourself, you must set disable_trigger=1 yourself, if you pull in the grub package.
• A new option ToolsTreeSnapshot was added, which defaults to the value of the regular Snapshot= setting
  if the same distribution is used for the image and the tools tree.