Prevent accidental publishing of crates that are not meant to be publ…

[andreacorbellini]

Summary

Added publish = false to internal crates that are not meant to be published, to prevent accidental publishing.

The only crates that don't have publish = false are ironfish and ironfish_zkp.

Testing Plan

cargo publish --dry-run -p benchmarks (and similar for other crates) should fail with:

error: `benchmarks` cannot be published.
`package.publish` is set to `false` or an empty list in Cargo.toml and prevents publishing.

Documentation

N/A

Breaking Change

N/A