Use relaxed SealedBlock in txpool API

[mattsse]

Describe the feature

the update fn currently expects a specific block type

reth/crates/transaction-pool/src/validate/mod.rs

Line 209 in d68d7c8

fn on_new_head_block(&self, _new_tip_block: &SealedBlock) {}

we can either solve this introducing a new associated type on the validator trait, or provide the generics on the function.
the latter would be easier but would not allow for type specific validator impls, but this should likely be fine and we can still change it later.

TODO

• make SealedBlock arg generic over header+body

Additional context

No response

[stevencartavia]

🙋🏽‍♂️