Use packages built by CMake for downloads of "Other Linux Distros"

Our CMake build process produces tarball packages using the cpack TGZ target. This produces a server and client package with a file layout meant to match where the various artifacts go.

Meanwhile, the packages we include on the download page are a flat archive of various binaries produced by the build process. This include one regular package and one debug package with debug symbols for a few of the binaries. These packages are produced by the website build process.

We should produce these artifacts via CMake.