[CoreOS] Thanks to everyone who participated in the FCOS 35 test day/week

[Dusty Mabe]

I'd like to say the test day/week has been a huge success. We had reported results
from 15 participants and found the following issues/docs updates:

- FCOS with 5.14+ kernel fails to boot on xen instances
    - https://github.com/coreos/fedora-coreos-tracker/issues/997
- kargs: interactive changes through editor always result in 'No changes'
    - https://github.com/coreos/rpm-ostree/issues/3182
- provisioning/ibmcloud: a few updates
    - https://github.com/coreos/fedora-coreos-docs/pull/334
- provisioning/gcp: Define not supported login methods for GCP
    - https://github.com/coreos/fedora-coreos-docs/pull/333
- tutorial-services: Add Wants=network-online.target
    - https://github.com/coreos/fedora-coreos-docs/pull/331
- os-extensions: fix yaml file for dns issue
    - https://github.com/coreos/fedora-coreos-docs/pull/330
- Fix 404 link to DigitalOcean's droplet metadata
    - https://github.com/coreos/fedora-coreos-docs/pull/328
- provisioning-vmware: fix explanation of govc argument limit
    - https://github.com/coreos/fedora-coreos-docs/pull/327


#997 corresponds to an F35 blocker bug
[BZ#2010058](https://bugzilla.redhat.com/show_bug.cgi?id=2010058) and prevented us from
shipping a change to our `stable` stream that would have guaranteed breakage for some
users. This also led us to expand our automated test coverage for this case in the
future:

- kola-aws: also run on m4.large
    - https://github.com/coreos/fedora-coreos-pipeline/pull/416

The full test day results page can be viewed at:
https://testdays.fedoraproject.org/events/122

We do still have some platforms that weren't tested so feel free to execute those test
cases!

Dusty Mabe