primitives: use alloy BlockWithParent

[tcoratger]

Describe the feature

Now that alloy-rs/alloy#1650 has been merged, after the next release of alloy, we will be able to use directly the BlockWithParent alloy type and remove the redundant definition from reth here

reth/crates/primitives-traits/src/header/sealed.rs

Lines 14 to 21 in d9ed07a

	/// A helper struct to store the block number/hash and its parent hash.
	#[derive(Debug, Clone, PartialEq, Eq, Hash, Serialize, Deserialize)]
	pub struct BlockWithParent {
	/// Parent hash.
	pub parent: B256,
	/// Block number/hash.
	pub block: BlockNumHash,
	}

Additional context

No response

[aroralanuk]

With the v0.7 of alloy, this is not blocked anymore here (https://github.com/alloy-rs/alloy/releases/tag/v0.7.0) but alloy_eips needs a matching verison for alloy_consensus which has a new field target_blobs_per_block in Header which breaks here:

reth/crates/storage/codecs/src/alloy/header.rs

Line 111 in 88bde87

let alloy_header = Self {