arrow

GH-42128: [Packaging][CentOS] Migrate CentOS 7 and CentOS Stream 8 packaging jobs to use vault.centos.org (#42129)

### Rationale for this change

Fixes https://github.com/apache/arrow/issues/42128.

### What changes are included in this PR?

- Updates to the CentOS 7 and CentOS Stream 8 Dockerfiles we use in the Crossbow packaging job to point to vault.centos.org so they continue to run now that both distros are EOL

### Are these changes tested?

Yes, I successfully built both updated Dockerfiles locally.

### Are there any user-facing changes?

No.
* GitHub Issue: #42128

Lead-authored-by: Bryce Mecum <petridish@gmail.com>
Co-authored-by: Sutou Kouhei <kou@cozmixng.org>
Signed-off-by: Sutou Kouhei <kou@clear-code.com>