Add plumbing for PeerDAS supernodes (#5050, #5409, #5570, #5966) (#6216)

* Add plumbing for peerdas supernodes (#5050, #5409, #5570, #5966)
- add cli option `--subscribe-to-all-data-columns`
- add custody subnet count to ENR, only if PeerDAS is scheduled
- subscribe to data column topics, only if PeerDAS is scheduled

Co-authored-by: Jacob Kaufmann <jacobkaufmann18@gmail.com>

* Merge branch 'unstable' into das-supernode

* Update CLI docs.

* Merge branch 'unstable' into das-supernode

* Fix fork epoch comparison with `FAR_FUTURE_EPOCH`.

* Merge branch 'unstable' into das-supernode

* Hide `--subscribe-all-data-column-subnets` flag and update help.

* Fix docs only

* Merge branch 'unstable' into das-supernode

consensus/types/src/chain_spec.rs

@@ -426,6 +426,13 @@ impl ChainSpec {
         })
     }
 
+    /// Returns true if `EIP7594_FORK_EPOCH` is set and is not set to `FAR_FUTURE_EPOCH`.
+    pub fn is_peer_das_scheduled(&self) -> bool {
+        self.eip7594_fork_epoch.map_or(false, |eip7594_fork_epoch| {
+            eip7594_fork_epoch != self.far_future_epoch
+        })
+    }
+
     /// Returns a full `Fork` struct for a given epoch.
     pub fn fork_at_epoch(&self, epoch: Epoch) -> Fork {
         let current_fork_name = self.fork_name_at_epoch(epoch);