Governance UI only works with single instruction transactions

[nathanleclaire]

Oyster has support for passing multiple instructions per transaction in governance v2 using withInsertTransaction, but this is not currently supported by Realms UI as it uses getSingleInstruction.

https://github.com/solana-labs/governance-ui/blob/main/actions/executeTransaction.ts#L50

This is what I got after inserting other valid multi-instruction transaction with withInsertTransaction:

It can be worked around by inserting multiple single-instruction transactions, but it would be nice to have proper support for this. Filing issue to document.