ci: Update wasmtime to the latest release (38.0.2)

(backport <rust-lang#4762>)
(cherry picked from commit 00360b9)

Author: tgross35

ci/wasi.sh

@@ -11,7 +11,7 @@ apt-get install -y --no-install-recommends \
 
 # Wasmtime is used to execute tests and wasi-sdk is used to compile tests.
 # Download appropriate versions here and configure various flags below.
-wasmtime=35.0.0
+wasmtime=38.0.2
 wasi_sdk=27
 
 curl -L https://github.com/bytecodealliance/wasmtime/releases/download/v$wasmtime/wasmtime-v$wasmtime-x86_64-linux.tar.xz |