Gloas TODO tracking issue

[michaelsproul]

This is a meta-issue to track Gloas-related TODOs.

This issue should not be closed until Gloas is fully implemented and TODO-free.

Tags used for Gloas TODOs (expand this list while reviewing PRs):

• TODO(gloas)
• TODO(EIP-7732)
• TODO(EIP7732)

Specific TODOs can also be linked below.

[michaelsproul]

This one is important. We MUST add this to be compliant with the spec:

lighthouse/beacon_node/beacon_chain/src/envelope_verification.rs

Lines 233 to 234 in 2985ede

	// TODO(EIP-7732): check that we haven't seen another valid `SignedExecutionPayloadEnvelope`
	// for this block root from this builder - envelope status table check