Fix the hardcoded values for the mirror in the build and deploy time to be controlled during runtime

The URL in the last task of this file roles/cod_fix_centos_yum/tasks/main.yaml can be parameterized. Define the values in group_vars/all. They can be overridden during runtime, i.e., in the scheduled pipeline for build with the external mirrors defined here - https://vault.centos.org/

Similarly, parameterize the values in this file https://gitlab.rc.uab.edu/rc/hpc-factory/-/blob/main/ansible/roles/fix_centos_repo/tasks/main.yaml?ref_type=heads, which can be overridden during runtime, i.e., in the scheduled pipeline for deploy with the external mirrors defined here - https://vault.centos.org/