FEAT-#285: Implement shared object storage for MPI backend

[Retribution98]

What do these changes do?

Implementing shared storage to share data between workers instead of directly sending data.

Subtasks to do:

• Add shared memory allocation
• Add shared memory allocation on cluster
• Add an additional communication message type to send information about shared data
• Add procedure for reserving space in shared memory (Option 1 via Monitor worker)
• Add procedure for reserving space in shared memory (Option 2 via extra shared space)
• Add writing serialized data to shared memory and reading it from there
• Add environment variable for shared memory usage threshold
• Add shared data communication between different hosts in a cluster
• Add data cleanup in shared memory
• Check performance boost
• Fix slowdown on high CPU count (there are two thoughts about the issue: 1) the previous approach is more beneficial in certain cases, 2) high-memory consumption)

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• passes flake8 .
• passes black .
• signed commit with git commit -s
• Resolves [MPI] Implement shared object storage per node #285
• tests added and passing
• module layout described at docs/developer/architecture.rst is up-to-date

[YarShev]

@Retribution98, awesome changes! Now the MPI backend supports the shared object storage. Keep it up. Thanks!