[browser][MT] asynch dispatch soundness

[pavelsavara]

make sure that functions passed to emscripten_dispatch_to_thread_async

• don't throw JS exceptions
• don't throw managed exceptions
• don't leak JS interop stack frame
• sync version propagates errors or error codes
• invoke_later_when_on_ui_thread_sync and invoke_later_when_on_ui_thread_async should catch all including "memory access out of bounds"

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Issue Details

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make sure that functions passed to emscripten_dispatch_to_thread_async

• don't throw JS exceptions
• don't throw managed exceptions
• don't leak JS interop stack frame
• respect GC boundary

Author:	pavelsavara
Assignees:	pavelsavara
Labels:	arch-wasm, area-VM-threading-mono, os-browser
Milestone:	9.0.0

[pavelsavara]

related #76957

[pavelsavara]

Closed by #100610 and #100855