Fedora 35 toolbox image has Rawhide release identity

[vchernin]

Describe the bug
The Fedora 35 toolbox image incorrectly uses the Rawhide repos for dnf, which means it doesn't have the Fedora 35 release identity. This should have been adjusted when Fedora 35 was branched from Rawhide.

Workarounding by removing the Fedora 35 image I had installed and pulling the latest one, then creating a new container did not solve the issue.

Steps how to reproduce the behaviour

1. Make a fedora 35 toolbox
2. Run # dnf update
3. See Rawhide repos are used.

Expected behaviour
Fedora 35 repos are used.

Actual behaviour
Rawhide repos were used for an image that was supposed to be Fedora 35.
Workarounding as described in #722 should help (but it didn't for me)

Output of toolbox --version (v0.0.90+)
e.g., toolbox version 0.0.90

Toolbox package info (rpm -q toolbox)
e.g., toolbox-0.0.18-2.fc32.noarch

Output of podman version
e.g.,

Version:      3.3.0
API Version:  3.3.0
Go Version:   go1.16.6
Built:        Fri Aug 20 12:35:44 2021
OS/Arch:      linux/amd64

Podman package info (rpm -q podman)
podman-3.3.0-1.fc35.x86_64

Info about your OS
Fedora Silverblue 35
Fedora Linux 35.20210904.n.0

[vchernin]

Ok, pulling the latest image per these instructions: #722 (comment) now works.

Likely due to #871 (comment)

This particular case with Fedora 35 is workarounded, but the general problem still exists in #722.