Downgrade EngineValidator from component to part of the AddOns

[mattsse]

Describe the feature

reth/crates/node/api/src/node.rs

Lines 90 to 91 in 025cb3b

	/// Returns the engine validator.
	fn engine_validator(&self) -> &Self::EngineValidator;

is only required for launching the engine API

which is as of recently part of the launch_addons function:

reth/crates/node/builder/src/rpc.rs

Line 414 in 025cb3b

node.engine_validator().clone(),

this means we can integrate this into Addons:

reth/crates/optimism/node/src/node.rs

Line 142 in 025cb3b

for OptimismAddOns<N>

Additional context

No response