fix: update spack role deps from gcc-7 to gcc (Ubuntu 22.04+)

- spack: Replace gcc-7/gfortran-7 with unversioned gcc/gfortran
- Remove abims_sbr.singularity from requirements.yml (dead project)
- Remove singularity_wrapper from molecule CI (broken Galaxy dep)
- Molecule: remove /sbin/init from all configs — the ubuntu-2204
  Docker image can't run systemd on GH Actions runners (known cgroup
  v2 incompatibility). Roles that need running services are tested
  end-to-end on real MAAS VMs instead.

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
Signed-off-by: Douglas Holt <dholt@nvidia.com>

Author: dholt

.github/workflows/molecule.yml

@@ -14,18 +14,18 @@ jobs:
           - facts
           - kerberos_client
           - lmod
-          - nis_client
           - nfs
           - nhc
           - nvidia_dcgm
+          - nis_client
           - openmpi
           - openshift
           - rsyslog_client
           - rsyslog_server
           - mofed
-          - singularity_wrapper
           - slurm
           - spack
+          # Excluded: singularity_wrapper (depends on broken upstream Galaxy role)
     steps:
       - name: check out repo
         uses: actions/checkout@v4

roles/requirements.yml

@@ -67,8 +67,5 @@ roles:
 - src: https://github.com/OSC/ood-ansible.git
   version: 'v3.0.3'
 
-- src: abims_sbr.singularity
-  version: 3.7.1-4
-
 - src: gantsign.golang
   version: 3.5.0

roles/spack/defaults/main.yml

@@ -6,8 +6,8 @@ spack_user: "root"
 spack_group: "root"
 
 spack_ubuntu_deps:
-- "gcc-7"
-- "gfortran-7"
+- "gcc"
+- "gfortran"
 - "make"
 - "git"