[Bug]: governance.proposal.transfer.maxAmount needs to be expressed as a quantum multiplier

[ze97286]

Problem encountered

governance.proposal.transfer.maxAmount determines the maximum amount to be transferred in a governance transfer. While it can be applied on any asset it is treated as a number in the units of the transfer asset which is wrong. Instead it should be treated as a multiplier over the quantum of the transfer asset.

Observed behaviour

max amount is used as a number in the decimals of the transfer asset.

Expected behaviour

max amount should be a quantum multiplier.

Steps to reproduce

1. Submit `xyz` transaction
2. With this payload
3. Query `abc` API
4. Observe the error

Software version

develop

Failing test

No response

Jenkins run

No response

Configuration used

No response

Relevant log output

No response