GHSA-7C4J-2M43-2MGH nimiq-primitives: Node crash due to missing interlink validation in election macro block proposals

Impact An untrusted p2p peer can cause a node to panic by announcing an election macro block whose validators set contains an invalid compressed BLS voting key. Hashing an election macro header hashes validators and reaches Validators::votingkeys, which calls validator.votingkey.uncompress.unwrap...