Add Slurm email notification flags to examples

[Premas]

What would you like to see added?

We will have to include #SBATCH --mail-user and --mail-type=BEGIN,END,FAIL in either the basic Slurm script example or across all examples. This will help users get email notifications when jobs start, end, or fail.

#SBATCH --mail-user=myemail@example.com
#SBATCH --mail-type=BEGIN,END,FAIL

Where to include?
https://docs.rc.uab.edu/cheaha/slurm/submitting_jobs/
https://docs.rc.uab.edu/cheaha/slurm/slurm_tutorial/
Other examples if any