Add handy function Exchange.zetaGroupPubkeyToAsset()

[filipzeta]

Store a map to grab zetagroup asset by pubkey without an RPC fetch or having to manually filter all zetaGroups

[filipzeta]

Tested locally with the following code:

This gives the right assets SOL/BTC/ETH/APT/ARB. In reality we wouldn't use getZetaGroupAddress(), we'd have the pubkey from elsewhere.