Add EL10 to CI

[kolyshkin]

Let's test runc on EL10.

[kolyshkin]

Ah, there's no almalinux-10 available from GCP:

Failed to start an instance: INVALID_ARGUMENT: Not Found 404 Not Found POST https://compute.googleapis.com:443/compute/v1/projects/cirrus-ci-community/zones/us-central1-c/instances { "error": { "code": 404, "message": "The resource 'projects/almalinux-cloud/global/images/family/almalinux-10' was not found", "errors": [ { "message": "The resource 'projects/almalinux-cloud/global/images/family/almalinux-10' was not found", "domain": "global", "reason": "notFound" } ] } }

There's centos-stream-10 though