Removes additional sbatch and fixes default profile in cluster deployment (#1229)

# Description

In the slum workflow, currently, there was an unnecessary `sbatch`
command; this PR removes it. In addition, the profile argument was
marked as optional, but when a job was submitted, and job arguments were
passed, it became necessary. This PR fixes this behavior.

## Type of change

- Bug fix (non-breaking change which fixes an issue)

## Checklist

- [x] I have run the [`pre-commit` checks](https://pre-commit.com/) with
`./isaaclab.sh --format`
- [ ] I have made corresponding changes to the documentation
- [x] My changes generate no new warnings
- [ ] I have added tests that prove my fix is effective or that my
feature works
- [ ] I have updated the changelog and the corresponding version in the
extension's `config/extension.toml` file
- [x] I have added my name to the `CONTRIBUTORS.md` or my name already
exists there

Author: pascal-roth

docker/cluster/cluster_interface.sh

@@ -62,11 +62,9 @@ submit_job() {
 
     case $CLUSTER_JOB_SCHEDULER in
         "SLURM")
-            CMD=sbatch
             job_script_file=submit_job_slurm.sh
             ;;
         "PBS")
-            CMD=bash
             job_script_file=submit_job_pbs.sh
             ;;
         *)
@@ -75,7 +73,7 @@ submit_job() {
             ;;
     esac
 
-    ssh $CLUSTER_LOGIN "cd $CLUSTER_ISAACLAB_DIR && $CMD $CLUSTER_ISAACLAB_DIR/docker/cluster/$job_script_file \"$CLUSTER_ISAACLAB_DIR\" \"isaac-lab-$profile\" ${@}"
+    ssh $CLUSTER_LOGIN "cd $CLUSTER_ISAACLAB_DIR && bash $CLUSTER_ISAACLAB_DIR/docker/cluster/$job_script_file \"$CLUSTER_ISAACLAB_DIR\" \"isaac-lab-$profile\" ${@}"
 }
 
 #==
@@ -162,11 +160,17 @@ case $command in
         scp $SCRIPT_DIR/exports/isaac-lab-$profile.tar $CLUSTER_LOGIN:$CLUSTER_SIF_PATH/isaac-lab-$profile.tar
         ;;
     job)
-        [ $# -ge 1 ] && profile=$1 && shift
+        if [ $# -ge 1 ]; then
+            passed_profile=$1
+            if [ -f ".env.$passed_profile" ]; then
+                profile=$passed_profile
+                shift
+            fi
+        fi
         job_args="$@"
-        echo "Executing job command"
-        [ -n "$profile" ] && echo "Using profile: $profile"
-        [ -n "$job_args" ] && echo "Job arguments: $job_args"
+        echo "[INFO] Executing job command"
+        [ -n "$profile" ] && echo -e "\tUsing profile: $profile"
+        [ -n "$job_args" ] && echo -e "\tJob arguments: $job_args"
         source $SCRIPT_DIR/.env.cluster
         # Get current date and time
         current_datetime=$(date +"%Y%m%d_%H%M%S")