Update Teku Dashboard (Validator Panel) post MaxEB

[lucassaldanha]

For Electra, we should re-visit some of our dashboard panels and see if we should update them.

An example is the active validator count. Post Electra, it isn't super valuable by itself, because you could have just a few validators running in one node, but a large amount of Ether staked by them; versus a node with many validators but with the traditional 32 eth per validator staked. To address this case, we need a new panel with the staked amount of ether for all validators in that node.

It is possible that there are other panels that need to be updated/created/removed.