Use OP components in custom transaction example

[klkvr]

Describe the feature

Right now we're using mocked components in the example:

reth/examples/custom-node/src/lib.rs

Lines 52 to 53 in 55f4b0b

	type ComponentsBuilder =
	ComponentsBuilder<N, CustomPoolBuilder, (), (), (), CustomConsensusBuilder>;

We should replace those with actual components. Ideally, OP components should work here directly so that users are able to just reuse them. If this is not feasible for some of the components, we can introduce custom ones

Additional context

No response