Phase-2: Update to new base image
The new base images include a few different changes:
- Update to doxygen version 1.9.8
- Add man pages
- Devel images: Add coloured prompt incl. git branch, exit code & command duration
- CentOS7: Update to git 2.27. Add clang-format and clang-tidy.
- Alma 8: Add include-what-you-use