feat: take into account hideAbstain when computing results

[wa0x6e]

Summary

Closes: https://github.com/snapshot-labs/workflow/issues/380

This PR uses the hideAbstain property in the space settings, when computing results.

When hideAbstain is enabled, abstain in basic voting is ignored from the quorum and results

// when hide_abstain = false
total_score = for_score + against_score + abstain_score

// when hide_abstain = true
total_score = for_score + against_score 

How to test

1. Go to a space with hideAbstain enabled: http://localhost:8080/#/s:safe.eth/proposal/0x5cf64434792565591b005460db0460e9314753178d4aa5475dfc0ce4d45638a2
2. The results should exclude abstain choice from the results list, and quorum should not take abstain scores into account. Results should be same as v1 https://v1.snapshot.box/#/safe.eth/proposal/0x5cf64434792565591b005460db0460e9314753178d4aa5475dfc0ce4d45638a2

Notes

Excluding ABSTAIN from all scores results in lower quorum, and is marking a proposal that have passed before this PR as rejected (see the example proposal above)

Since the hide_abstain option can change proposal outcome depending on its setting, it should not be a global option, and each proposal should have its own local copy (like privacy)

[Sekhmet]

I think I'd keep Number conversions, our types are inaccurate (we get strings/bigints/numbers in them) 😆

[Sekhmet]

Let's add test case for hide_abstain.

[bonustrack]

Please dont merge this PR. This feature is not much used and its actually not working fully the way it was designed, technically we should store at the proposal level if it use hide abstain and compute quorum based on that. On v1 we show different quorum at the feed or at the proposal level its misleading.