eip7732: use bid in block parent validation

[ahshum]

As validation around block.parent_root

consensus-specs/specs/gloas/p2p-interface.md

Lines 171 to 172 in ca5f3cd

	- [REJECT] The block's parent (defined by `block.parent_root`) passes
	validation.

is going to be removed in Gloas, I believe the new validation should be using bid instead

consensus-specs/specs/gloas/p2p-interface.md

Lines 181 to 182 in ca5f3cd

	- [REJECT] The block's parent (defined by `block.parent_root`) passes
	validation.

This PR aims to fix the added validation (the latter).

[ahshum]

If the latter rule is needed and intended, should it make sense to remove both from spec?

[terencechain]

yes, I believe that should be bid, thanks!

[potuz]

LGTM

[potuz]

The wording in p2p is a bit weird now. The issue is that in the Phase 0 spec we already have this condition

- _[REJECT]_ The block's parent (defined by `block.parent_root`) passes
  validation.

Which was later modified in Bellatrix with the addition of the execution payload condition. This line should not be removed in Gloas, just that the validity of the payload is not necessarily required. That is, the original Phase0 statement should remain.

The check added in this PR should simply be that the bid's parent block root should be equal to the block's parent block root, since the validity of said block is guaranteed by that phase0 line.

[ahshum]

That makes sense to me. So should I delete the entry for the removed rule and update the wording and statement of the added rule?