Support --debug.tip in EthService

[mattsse]

--debug.tip is a useful setting provided via CLI, this will trigger a pipeline (backfill) sync right away

reth/crates/node/builder/src/launch/mod.rs

Line 251 in ffb44e6

let initial_target = ctx.node_config().debug.tip;

currently we're missing a way to trigger this on the ChainOrchestrator type

reth/crates/engine/tree/src/chain.rs

Line 35 in ffb44e6

{

TODO

• add a way to trigger pipeline sync on chain orchestrator