Merge branch 'ps/ci-rust' into dk/ci-rust-fix

* ps/ci-rust: rust: support for Windows ci: verify minimum supported Rust version ci: check for common Rust mistakes via Clippy rust/varint: add safety comments ci: check formatting of our Rust code ci: deduplicate calls to `apt-get update` t8020: fix test failure due to indeterministic tag sorting gitlab-ci: upload Meson test logs as JUnit reports gitlab-ci: drop workaround for Python certificate store on Windows gitlab-ci: ignore failures to disable realtime monitoring gitlab-ci: dedup instructions to disable realtime monitoring ci: enable Rust for breaking-changes jobs ci: convert "pedantic" job into full build with breaking changes BreakingChanges: announce Rust becoming mandatory varint: reimplement as test balloon for Rust varint: use explicit width for integers help: report on whether or not Rust is enabled Makefile: introduce infrastructure to build internal Rust library Makefile: reorder sources after includes meson: add infrastructure to build internal Rust library