Slurm installation

I set up and updated all packages on a fresh Rocky Linux 8.10 VM. This is the slurm Contoller Node.
I switched to the root user:
```
su - root
```

I read through this slurm guide and pulled this slurm install script:

wget --no-check-certificate https://raw.githubusercontent.com/NISP-GmbH/SLURM/main/slurm_install.sh

I set the version as 20.11.9:
```
export VER=20.11.9
```
I ran the slurm installation script:
```
bash slurm_install.sh
```
I did not enable slurm accounting support after checking the accounting documentation.

I tested that the slurm installation completed successfully and this was the case:

[root@rocky-linux-8-slurm-head-node ~]# sinfo
PARTITION AVAIL  TIMELIMIT  NODES  STATE NODELIST
test*        up   infinite      1   idle rocky-linux-8-slurm-head-node