The current implementation of remote attestation does not take into
account the integrity of the wasm module. The SHA256 of the wasm
module has been put into user_data to generate the quote, and more
parameters are exposed for further verification.
Improve the documentation for setting up SGX-RA using WAMR, based on
the feedback in #1670.
This notably highlights the dependency on Intel PCS and PCCS and how to
install/configure them.
