Add a config example for centos9-stream katello devel

[ianballou]

Since centos 8 stream is going EOL.

[ianballou]

@parthaa does this match with your strategy?

[wbclark]

So far, it seems that I am the only person who has run into this issue, but just in case anyone else faces ssh authentication problems due to EL9 images not supporting RSA keypairs:

First, try forcing a re-download of the latest CentOS 9 Stream base image; if that fails for whatever reason, patching your Vagrant with the following commits will fix it:

• https://github.com/hashicorp/vagrant/commit/b40f6e5fdae1113518e9c92f96dfcd364b646ff9
• https://github.com/hashicorp/vagrant/commit/67562588c97fb6a29e017a36aaec3240e4ada85a
• https://github.com/hashicorp/vagrant/commit/cebfb7a63b0d7306bd65585cefbcb61730385f31
• https://github.com/hashicorp/vagrant/commit/380afe5fac713d4ad930c147940beb9237c18379
• https://github.com/hashicorp/vagrant/commit/e0dbbcc04ce626c851eeba122ca45c66bfbf1342
• https://github.com/hashicorp/vagrant/commit/c8fc8b3ad2054110ea1f06d678abf58a98ff887f

[ianballou]

I added a commit that removes the rest of the centos8-stream references.

[wbclark]

@parthaa @jeremylenz the relevant puppet-katello_devel PRs are

• https://github.com/theforeman/puppet-katello_devel/pull/300
• https://github.com/theforeman/puppet-katello_devel/pull/302

[ianballou]

I'll wait a little longer for @archanaserver due to @ekohl 's message above.

[ianballou]

@ekohl I think I addressed all your comments

[ianballou]

Reviews have gone quiet and I got some acks, so merging now. The ansible-lint issue there appears to be unrelated.