[wasi] do we need VFS

[pavelsavara]

We are aiming for WASI hosts (like cloud services) which would not let us to map host FS.

• We could VFS DLLs, but we could also have memory snapshot instead
• We need to bundle the timezone database into .wasm and we need it for browser too. But it doesn't have to be VFS
• We need FS for runtime unit tests, but could be solved by mapping host directory (in our CI)

What are the other scenarios ?

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Issue Details

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We are aiming for WASI hosts (like cloud services) which would not let us to map host FS.

• We need to bundle the timezone database into .wasm and we need it for browser too. But it doesn't have to be VFS
• We need FS for runtime unit tests, but could be solved by mapping host directory

What are the other scenarios ?

Author:	pavelsavara
Assignees:	pavelsavara
Labels:	arch-wasm, area-Build-mono
Milestone:	8.0.0

[pavelsavara]

After offline discussion with the team, so far we think we need way how to embed resources into .wasm but we don't need full VFS emulation layer.