Shellspec jobs fail for CentOS 7

[bencomp]

What steps does it take to reproduce the issue?

• When does this issue occur?
  When recent commits are built, that trigger the Shellspec workflow, the CentOS 7 job fails.

• Which page(s) does it occurs on?
  n/a

• What happens?
  E.g., in https://github.com/IQSS/dataverse/actions/runs/9864329507/job/27239023962, the job fails because some dependencies are missing for the build system.

• To whom does it occur (all users, curators, superusers)?
  Developers

• What did you expect to happen?
  The job should pass.

Which version of Dataverse are you using?
These are recent builds. >= 6.3

Any related open or closed issues to this bug report?
In #9829 I found a different problem with the build system, but this is unrelated – except in the way that I feel CentOS 7 may have become unsupported.

Screenshots:
n/a, see the linked action run.

[donsizemore]

CentOS7 is now EOL and many mirrors have disabled or removed their content. If the shellspec job requires installing any software packaged for CentOS7 I would expect it to fail. Time to bump to Rocky9/Deb12/Ubuntu24.

[poikilotherm]

I removed CentOS 7 in ec6a252 as part of #9176, but am happy to take that out! Seeing that you started #10682 which is great!