SHM: segment cleanup on Windows

[yellowhatter]

Describe the bug

Recent tests showed that SHM has segment cleanup issue on Windows: https://www.notion.so/zettascale/Windows-Test-1923ef1357d98063af25f2e62f91f5b4?pvs=4

Dmitrii
@yu-yuan Yuan (Circle) okay, what I see at the first glance: the router holds SHM segments, and this is correct. Do they get removed when router is closed?

Yu-yuan Yuan (Circle)
Checked, nope.
But the size becomes less after a reboot.

To reproduce

Run SHM something

System info

Windows

[yellowhatter]

Made a PR for shared-memory crate, adding necessary functionality: elast0ny/shared_memory#112