[fulu] Inefficient network processor in fusaka-devnet-3

[twoeths]

Describe the bug

network processor "cannot accept work" is high in fusaka-devnet-3 super nodes

this is on a 1k hoodi node (which does not subscribe to all subnets)

"regen busy" is the main reason

this could lead to higher wait time of jobs, especially beacon_attestation, it could be ~1.7s

Expected behavior

"cannot accept work" should be close to 0, or need to investigate the reason if not

Steps to reproduce

No response

Additional context

No response

Operating system

Linux

Lodestar version or commit hash

unstable