[1.13.0 backport] finalization: Skip tree route calculation if no forks present#4760

EgorPopelyaev merged 4 commits intorelease-polkadot-v1.13.0paritytech/polkadot-sdk:release-polkadot-v1.13.0from

skunert/collator-sync-fix-backportparitytech/polkadot-sdk:skunert/collator-sync-fix-backportCopy head branch name to clipboard