bump multiaddr and serde deps, upgrade rust to a newer nightly

[delta1]

Description

Upgrades parity-multiaddr and serde deps, which also entailed using a newer rust nightly, fixing some compilation issues, and updating the dockerfile and CI definitions. A typical yak shave.

Motivation and Context

The docker build had a failing issue with the newer version of serde. version 1.0.119 has changed the visibility of its "export" module to private, requiring an update of the multiaddr crate and some code imports.

libp2p/rust-libp2p#1912

How Has This Been Tested?

• builds are working locally, in docker, and CI
• cargo test -p tari_comms

Types of changes

• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to change)
• Feature refactor (No new feature or functional changes, but performance or technical debt improvements)
• New Tests
• Documentation

Checklist:

• I'm merging against the development branch.
• I ran cargo-fmt --all before pushing.
• I ran cargo test successfully before submitting my PR.
• I have squashed my commits into a single commit.
• My change requires a change to the documentation.
• I have updated the documentation accordingly.
• I have added tests to cover my changes.

[sdbondi]

Nice!