Fedora CoreOS streams rebasing to Fedora Linux 36

[Dusty Mabe]

Following our scheduling policy around Fedora major version releases [1] we 
will be rolling out the Fedora Linux 36 rebase over the next few weeks. This
will start tomorrow with the `testing` stream.

During this development cycle we continued to follow the Fedora Change process
more closely [2] in order to provide a smoother transition of incoming Fedora
Changes. We also closely watched our package additions/removals [3] to carefully
evaluate any changes and determine if they were intentional.

Current known issues:

- network device IP doesn't get displayed to console [4]

Notable transitions in the Fedora 36 rebase:

- Podman 4.0, with some backwards incompatible changes [5]
- iptables nft by default, along with auto-migration [6]

Some highlights of recently added features/improvements:

- added a VirtualBox artifact [7] and updated documentation [8]
- added a Nutanix artifact [9]
- added support for a minimal ISO image [10]
- updated the VMWare OVA to use UEFI/SecureBoot by default [11]
- added CI testing for Azure [12]

Thanks to everyone who participated in the test week [13] and to everyone that
follows the `testing` and `next` streams to help us identify and fix issues
before they get to `stable`.


Dusty Mabe, for the Fedora CoreOS team

[1]
https://github.com/coreos/fedora-coreos-tracker/blob/main/Design.md#major...
[2] https://github.com/coreos/fedora-coreos-tracker/issues/918
[3] https://github.com/coreos/fedora-coreos-tracker/issues/1128
[4] https://github.com/coreos/fedora-coreos-tracker/issues/1153
[5] https://discussion.fedoraproject.org/t/fedora-coreos-moving-to-podman-v4/...
[6] https://discussion.fedoraproject.org/t/fedora-coreos-moving-to-iptables-n...
[7] https://github.com/coreos/fedora-coreos-tracker/issues/1008
[8] https://docs.fedoraproject.org/en-US/fedora-coreos/provisioning-virtualbox/
[9] https://github.com/coreos/fedora-coreos-tracker/issues/1007
[10] https://github.com/coreos/fedora-coreos-tracker/issues/868
[11] https://github.com/coreos/fedora-coreos-tracker/issues/1140
[12] https://github.com/coreos/fedora-coreos-tracker/issues/1020
[13] https://github.com/coreos/fedora-coreos-tracker/issues/1123#issuecomment-...