Performance issue when there are too many mesh peers

[twoeths]

Describe the bug

Right now mesh peer param Dhigh=12, there could be too many mesh peers per subnet on a test mainnet node

Gossip Block process time

Gossip Block Received Delay

If we configure network.gossipsubDHigh=9 so that there is no subnet has more than 9 mesh peers

we got better metric

Expected behavior

Lodestar should able to handle high number of mesh peers per spec (with Dhigh=12)

[twoeths]

gossipsubDHigh was set back to 12, closing the issue