fix: Add GROUP_RANK (#448)

Signed-off-by: oliver könig <okoenig@nvidia.com>
Signed-off-by: NeMo Bot <nemo-bot@nvidia.com>

Author: ko3n1g

nemo_run/core/execution/templates/dgxc.sh.j2

@@ -8,6 +8,7 @@ export TORCHX_MAX_RETRIES={{max_retries}}
 {%- for env_var in env_vars %}
 {{env_var}}
 {%- endfor %}
+export GROUP_RANK=$(echo $HOSTNAME | grep -oE '[0-9]+$')
 
 {%- if ft_enabled %}
 {{ fault_tolerance.ft_launcher_setup(fault_tol_cfg_path, fault_tol_finished_flag_file, fault_tol_job_results_file) }}