Add support for deploying FIPS environment using Ubuntu 20.04
This MR includes:
- Copy existing FIPS files to a CentOS specific folder. The old versions are left behind until we change the variable
REFERENCE_ARCHITECTURE
fromomnibus-gitlab
's RAT-Nightly trigger to sayomnibus-gitlab-mrs-fips-centos
. - Add support for deploying FIPS environment using Ubuntu 20.04.
Related to gitlab-org/omnibus-gitlab#6845 (closed)