This is a major update, as it is removing several Dracut scripts and making them distribution specific.

- Update to version 2.12.0:
* news: add notes for 2.12.0
* stages/files: add previousReport to result report
* tests: fix linter warning
* workflows: limit permissions to reading repo contents
* workflows: bump linter version
* go.mod: revendor
* Drop EOL Go versions
* internal/distro: drop DiskByIDDir
* providers/azure: add support for azure gen2 VMs
* stages/mount: correctly relabel the root of a fresh ext4 filesystem
* exec: fix permissions for mountpoints in home dirs
* tests: drop os.ModeDir requirement in mode of output directories
* examples: reboot with --force
* exec/util: add blkid API to query block devices based on FSTYPE
* stages/files: use IntToPtr() in createCrypttabEntries()
* stages/files: write result report to /var/lib/ignition
* engine: persist fetched config summaries in State
* stages/disks: use State to persist keyfiles for files stage
* *: add general mechanism for persisting state between stages
* main: drop -clear-cache flag
* engine: don't hardcode neednet path
* fetch-offline: return ErrNeedNet if we need net
* engine: switch Engine.logReport() to pointer receiver
* engine: fix incorrect error in log message
* dracut: drop ignition-setup-user.service
* dracut: drop reference to ignition-setup-base.service
* providers/gcp: access GCP metadata service by IP address
* Remove ignition-firstboot-complete.service
* OWNERS: remove
* internal/exec/util: drop device argument from cResultToErr()
* docs/config*: document storage.luks.clevis.threshold default
* ci: disable spec bump external test workaround
* docs: Add Ignition release / Spec version table
* templates: update example releng signing ticket
* templates: don't update %gotest lines
* Provide ignition-firstboot-complete.service (removed by upstream
due to correctly being considered distro spcific), based on the
old upstream version; removed all non-SUSE specific stuff and
integrated our own changes
* Removed change-ignition-firstboot-path.conf (changes are
integrated into ignition-firstboot-complete.service now).
* Provide ignition-setup-user.service (removed by upstream due
to correctly being considered distro spcific), based on the old
upstream version.
* Renamed ignition-setup-user-suse.sh to ignition-setup-user.sh
* Adapted ignition-generator-suse and module-setup.sh to use the
custom ignition-setup-user.service (no overriding of parts of the
service file necessary any more).
* Synced ignition-kargs-helper script with upstream example
* Raising minimum Go version to 1.15 as required by upstream