* Clean up the deployment related pages
- Add an index page for the linux deployment submenu
- Remove deployment options that are not yet completed (i.e. spack,
from source installation)
- remove the general deployment index page
- various cleanups and clarifications in the rest of the pages
* Move all deploy pages to deploy folder
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Co-authored-by: Gergely Meszaros <gergely@streamhpc.com>
