[riscv][wasm]Embed canonical signature id as constant

Port commit f2aaa9fd


Change-Id: I036cd6a7bd9f9c60a8248dcc3b2f4a8e05caa181
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/5716342


Reviewed-by: Ji Qiu <qiuji@iscas.ac.cn>
Auto-Submit: Yahan Lu <yahan@iscas.ac.cn>
Commit-Queue: Yahan Lu <yahan@iscas.ac.cn>
Cr-Commit-Position: refs/heads/main@{#95117}