move all alloy-compat code to a standalone module

[mattsse]

Describe the feature

instead of having various:

https://github.com/paradigmxyz/reth/blob/d46774411fee0802f4390e4f04b7184cdcdb3ea2/crates/primitives/src/block.rs#L150-L151

all of these should be moved into a single file that is feature gated

Additional context

No response

[guha-rahul]

can i take it?