docs: add a note on sources of non-determinism for module developers

[ebuchman]

Summary of Bug

The docs don't seem to clearly state the need to avoid sources of non-determinism and what those sources are.

See Thorchain's recent issue.

This is being somewhat addressed by a new linting tool, but should be more clear in the docs

Note there is some docs about this in Tendermint, we could just move that in here

Version

All

Steps to Reproduce

---

For Admin Use

• Not duplicate issue
• Appropriate labels applied
• Appropriate contributors tagged
• Contributor assigned/self-assigned

[julienrbrt]

Closed #13341 in favor of this. We should create an extension for that.

[tac0turtle]

done here #19158, thank you to the various teams involved