[State Sync] Disable DHT on staked network

[peterargue]

Problem Definition

The DHT is the source of significant memory and CPU overhead on Access nodes. It's also used on Execution nodes, but they have considerably more memory/cpu available.

See #5798 and #5747 for analysis.

Proposed Solution

Disable the DHT for the staked network. It is not required for bitswap to function, and adds significant overhead that impacts node performance.

[peterargue]

Instead of disabling complete, we've added CLI flags that an operator can use to disable it if there's an issue. we can make it the default later if we continue to see issues.