9184d52a9b
First the Cache directory itself was being added to the archive. It has
been updated to query the assets from the asset type folder i.e
Cache/<asset-type>
Second execute_process is being used to invoke CMake `tar` command to
create the zip archive since the CMake `file(ARCHIVE_CREATE)` adds the
files to the archive relative to the current working directory which is
${CMAKE_BINARY_DIR} when invoking the install script.
This was causing the archive to store files with a path of "../../Cache/pc"
Signed-off-by: lumberyard-employee-dm <56135373+lumberyard-employee-dm@users.noreply.github.com>