Fix more async tests #3060

Job	Run time
Test Async (allowed to fail)	1m 53s
Crate Unit Tests	2m 6s
Test (ubuntu-latest, c)	1m 59s
Build wit-bindgen (x86_64-linux, ubuntu-latest)	2m 46s
Test (ubuntu-latest, rust)	2m 45s
Check	2m 34s
Rustfmt	12s
Build wit-bindgen (x86_64-macos, macos-latest, x86_64-apple-darwin)	2m 29s
Test (ubuntu-latest, csharp)	12m 39s
verify-publish	2m 33s
Build wit-bindgen (aarch64-macos, macos-latest, aarch64-apple-darwin)	2m 17s
Test (macos-latest, c)	2m 32s
Build wit-bindgen (x86_64-windows, windows-latest)	6m 54s
Test (macos-latest, rust)	2m 59s
Build wit-bindgen (aarch64-linux, ubuntu-latest, aarch64-unknown-linux-gnu)	2m 53s
Test (windows-latest, c)	5m 21s
Test (windows-latest, rust)	6m 28s
Test (windows-latest, csharp)	16m 53s
Record the result of testing and building steps	1s
	1h 18m 14s

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