Update feedstock to use cirun-openstack-cpu-large with Cirun

[conda-forge-admin]

Note that only builds triggered by maintainers of the feedstock (and core)
who have accepted the terms of service and privacy policy will run
on Github actions via Cirun.

• Maintainers have accepted the terms of service and privacy policy
  at https://github.com/Quansight/open-gpu-server

Also, note that rerendering with Github actions as CI provider must be done
locally in the future for this feedstock.

[conda-forge-webservices]

Hi! This is the friendly automated conda-forge-linting service.

I just wanted to let you know that I linted all conda-recipes in your PR (recipe) and found it was in an excellent condition.

[hmaarrfk]

Wow! Amazing job. Are are the next steps for you here? Are you going to attempt a few migrations or do you want to merge this as is?

[isuruf]

Let's merge as is

[isuruf]

I do want to work on #372 after this

[hmaarrfk]

ok please merge at will! Thanks!

[h-vetinari]

Amazing - sorry I couldn't tackle this sooner myself; in any case, I've been wanting to build TF from CI for years! 🤩

[h-vetinari]

I do want to work on #372 after this

@isuruf, if you're still interested, we've made some progress on this in #385, but still running into some of the same issues as in #372.