stop reading denom purse balances from chainstorage

[turadg]

What is the Problem Being Solved?

A follow-on to #6652 is to stop writing purse balances to chain storage. wallet-app and dapp-psm rely on this currently. This ticket serves to organize keeping that functionality working through the Vaults Release.

Description of the Design

Basically read denom balances from Cosmos. The only purse that is read from chainstorage is Invitations.

Tasks

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1. fix!(smart-wallet): omit redundant chainStorage balances updates #6807
   automerge:rebase +1
   
2. Read vbank assets from x/bank not wallet.current wallet-app#49
   +0
   
3. read denom balances from vbank instead of vstorage dapp-psm#56
   enhancement vaults_triage +2
   

For the latter we could,

1. Make dapp-psm read denom balances from Cosmos
2. Make dapp-inter include PSM functionality (and read denom balances from Cosmos)
3. Both

We've chosen option #2 for Vaults release, meaning that dapp-psm will stop working and users will have to use the PSM part of dapp-inter. If we end up needing a separate dapp-psm we can make it.

That was Jan 18. As of Jan 27 we opted for #1 instead because due to some other work that has landed #1 is cheaper than #2.

Security Considerations

Test Plan