RPM build: move static web content into a separate package
Split the static web content off into a separate RPM package. Until now, we built two packages for different Python versions:
- python3-hzb-rdm-web
- python311-hzb-rdm-web
Now, we build three:
- python3-hzb-rdm-web
- python311-hzb-rdm-web
- hzb-web-static
The third one containing only static web content (the HZB logo). It is neither Python nor RDM specific, so we removed both parts from the name.
This makes the RPM linter happy and fixes #1.