feat: nwaku dashboard with relay per shard, non-relay request rates and traffic panels

[NagyZoltanPeter]

Changes related to issue:

• https://github.com/waku-org/nwaku/issues/1945

and nwaku PRs:

• https://github.com/waku-org/nwaku/pull/2851
• https://github.com/waku-org/nwaku/pull/2920

Changes: metric panels added:

• [X] waku relay bandwidth per shard
  • in : gross/net
  • out: net
• [X] Non relay protocols request rates
• [X] Non relay protocols traffic in
• [X] Non relay protocols traffic out

[Ivansete-status]

Thank you so much for this @NagyZoltanPeter ! Could you kindly add some screen shots/cuts with the new panel that is being added? Cheers