Raise wasi-sdk to 25 and wabt to 1.0.37. It includes
- Refactor CI workflow to install WASI-SDK and WABT from a composite action
- Use ExternalProject to bring wasm-apps for few samples. file/ wasi-threads/
- Refactor sample build and test steps in SGX compilation workflow for improved clarity and efficiency (workaround)
Add CMake support for EMSCRIPTEN and WAMRC, update module paths
```
CMake Error at CMakeLists.txt:4 (cmake_minimum_required):
Compatibility with CMake < 3.5 has been removed from CMake.
Update the VERSION argument <min> value. Or, use the <min>...<max> syntax
to tell CMake that the project requires at least <min> but has been updated
to work with policies introduced by <max> or earlier.
Or, add -DCMAKE_POLICY_VERSION_MINIMUM=3.5 to try configuring anyway.
```
`wasi-sdk-20` pre-release can be used to avoid building `wasi-libc` to enable threads.
It's not possible to use `wasi-sdk-20` pre-release on Ubuntu 20.04 because of
incompatibility with the glibc version:
```bash
/opt/wasi-sdk/bin/clang: /lib/x86_64-linux-gnu/libc.so.6: version `GLIBC_2.34' not found
(required by /opt/wasi-sdk/bin/clang)
```
