Remove accounts to store deposits within Governance

[rigelrozanski]

Currently we use auth accounts to store deposits within governance, this should be updated to use a running tally, similar to how staking tracks coins.

REF: #3567

CC @sunnya97

[alexanderbez]

@sunnya97 mind if I take a stab at this?

[sunnya97]

@alexanderbez This requires fixing the bank module to track total supply instead of the staking module. Essentially redoing PR #2939 that was pushed post launch.

However, that is probably out of scope for v0.34.0 @jackzampolin

[alexanderbez]

Ok, great. Thank you for the update. Removing this from v0.34 then as this is a non-trivial modification.

[rigelrozanski]

@sunnya97 oh okay I think I understand, the total supply calculated by staking doesn't know about the coins stored in deposits - hence we need a generic way (in bank) to calculate total supply which different modules can register special functionality with.

This Issue is blocked by #3972