Mount CI's Storage as read-only storage for real-bug (ReleaseExport machine)

Now every registered (by ExportTool) integration is tar'ed and copied to real-bug where the tar package is extracted again so that ReleaseExport can produce final releasable content. This approach has the folloing cons:

• Coin master resources are wasted to pack the .tar and disk space temporarily which is roughly 50G-60G per integration
• Network bandwidth is consumed to transfer the 50G-60G per registered integration to real-bug
• real-bug needs to unpack the tar
• in effect there are 2 duplicates of each (tqtc-)qt5, 3dstudio, qtcreator, etc. integrations which is about 100++G per integration which quickly eats disk space from the compellent
• transferring each tar'ed integration to real-bug also takes some time

Proposal:

mount the Coin's storage as read-only storage for real-bug machine

Possible cons:

• garbage collector, a new integration is started which the ReleaseExport still depends on (export ongoing) and the GC starts cleaning this integration away from storage?
• Coin reboots -> storage disappears from ReleaseExport in the middle of the export?