Gloas: send early payload envelopes to reprocess queue

[jimmygchen]

Description

Early payload envelopes (arriving before their slot is current) are detected by the gossip handler but silently dropped instead of being sent to the reprocess queue:

lighthouse/beacon_node/network/src/network_beacon_processor/gossip_methods.rs

Lines 3344 to 3354 in 7610932

	"envelope arrived early"
	);
	// TODO(gloas) update metrics to note how early the envelope arrived
	let inner_self = self.clone();
	let _process_fn = Box::pin(async move {
	inner_self
	.process_gossip_verified_execution_payload_envelope(
	peer_id,
	verified_envelope,

Blocks already handle this by sending early arrivals to the reprocess queue with a delay. Envelopes should do the same to avoid unnecessary RPC lookups.

Related to #8806.