Use wasm_shim compiled with AOT

[andreaTP]

No description provided.

[andreaTP]

2 commits:

• one enables the Aot compiler for the module
• the second is an example on how to use the "pre-compiled AOT", key advantages:
  • resulting artifact size (we don't need to ship the entire .wasm file but a more lightweight version of it
  • speed, as compilation happens during build time and not on startup

[chirino]

lgtm