[25.05] various: avoid throwing for invalid platforms combinations in CI#427372

wolfgangwalther merged 5 commits intoNixOS:release-25.05NixOS/nixpkgs:release-25.05from

wolfgangwalther:ci-backport-eval-asserts-variouswolfgangwalther/nixpkgs:ci-backport-eval-asserts-variousCopy head branch name to clipboard