This contribution adds `odoo15` as a fixed version. To allow reusing the existing test for Odoo, I made the package attribute configurable. To reference the test for `odoo15` in `passthru` I added it to `all-tests.nix`.
···349349 invidious = handleTest ./invidious.nix {};
350350 oci-containers = handleTestOn ["aarch64-linux" "x86_64-linux"] ./oci-containers.nix {};
351351 odoo = handleTest ./odoo.nix {};
352352+ odoo15 = handleTest ./odoo.nix { package = pkgs.odoo15; };
352353 # 9pnet_virtio used to mount /nix partition doesn't support
353354 # hibernation. This test happens to work on x86_64-linux but
354355 # not on other platforms.