Add initial support for RPM packaging (#121)

- Add gen-rpm
- Package rpm in CI testing and releases
- Remove fedora 33 from testing (end of life)
- Update arguments for `build_private.sh` and `build_sunshine.sh`

Co-authored-by: ReenigneArcher <42013603+ReenigneArcher@users.noreply.github.com>

scripts/Dockerfile-fedora_33

@@ -18,9 +18,10 @@ RUN dnf -y update && \
         openssl-devel \
         opus-devel \
         pulseaudio-libs-devel \
+        rpm-build \
     && dnf clean all \
     && rm -rf /var/cache/yum
 
 # Entrypoint
 COPY build-private.sh /root/build.sh
-ENTRYPOINT ["/root/build.sh"]
+ENTRYPOINT ["/root/build.sh", "-rpm"]