Description

Shorten Dockerfile and reduce number of Copr repositories.

Motivation and context

Our new CentOS 7 Dockerfile can be reduced even further by pulling cmake3, libyubikey and libykpers-1 from CentOS/Fedora EPEL. This reduces the number of required external repositories even further and we also don't need to build the YubiKey libs ourselves anymore.

How has this been tested?

AppImage build still working, YubiKey also detected successfully at runtime.

Types of changes

• ✅ Bug fix (non-breaking change which fixes an issue)

Checklist:

• ✅ I have read the CONTRIBUTING document. [REQUIRED]
• ✅ My code follows the code style of this project. [REQUIRED]
• ✅ All new and existing tests passed. [REQUIRED]
• ✅ I have compiled and verified my code with -DWITH_ASAN=ON. [REQUIRED]