maybe create WASM module export from `[UnmanagedCallersOnly]`

[lewing]

UnmanagedCallersOnly symbols could create exports in the wasm module. Particularly if they are not resolved statically in the rest of the build.

[jkotas]

cc @yowl

Tagging subscribers to 'arch-wasm': @lewing
See info in area-owners.md if you want to be subscribed.

Issue Details

---

UnmanagedCallersOnly symbols could create exports in the wasm module. Particularly if they are not resolved statically in the rest of the build.

Author:	lewing
Assignees:	maraf
Labels:	arch-wasm, untriaged, area-Interop-mono
Milestone:	-