Add batch test to xfer qos from Perlmutter

[shahzebsiddiqui]

@Xiangs18 here is a task for you

We can submit jobs to xfer qos shown below is an example from Perlmutter

sbatch -n 1 -q xfer -t 10 --wrap=="hostname"
Submitted batch job 2356674

According to https://docs.nersc.gov/jobs/policy/#perlmutter-login we can submit only 1 job to xfer qos at a time. We should declare an executor perlmutter.slurm.xfer in configuration file: https://github.com/buildtesters/buildtest-nersc/blob/devel/config.yml and run a hostname test. All queue tests can be declared in https://github.com/buildtesters/buildtest-nersc/tree/devel/buildspecs/queues

[Xiangs18]

Linked with merge request !55 on GitLab