Add tally endpoint for Gov CLI and REST

[sunnya97]

Use the querier in #1918

• Rest
• CLI

[fedekunze]

@sunnya97 how would this endpoint be ?

[sunnya97]

It returns a TallyResult.

TallyResult struct {
	Yes        sdk.Dec `json:"yes"`
	Abstain    sdk.Dec `json:"abstain"`
	No         sdk.Dec `json:"no"`
	NoWithVeto sdk.Dec `json:"no_with_veto"`
}

If you call it for a proposal that's already completed voting, it just gives you the final tally results.
If you call it for a proposal currently in its voting period, it gives you the current tally as if it were to end right now.

If you call it for a proposal still in DepositPeriod, it will just return an empty tally.

[fedekunze]

@sunnya97 Are you working on this somewhere ? Otherwise I can pick it up if you like

[sunnya97]

Ah, oops. This was actually closed by #2141