Get dependencies ready to provide a debian package
etcd v2 client bumped to the latest v3.4 (v3.4.23), on go.mod is referenced as v0.0.0-20240911181550-c123b3ea3db3 due to https://github.com/etcd-io/etcd/issues/11154
gobgp version is synced with what debian bookworm provides (v3.10.0)
This MR ships commits from !66 (merged) and !67 (merged)
Bug: T376600