Scratch testnet 3 (for testing only)

[pcarranzav]

Not meant to be merged.
Includes the changes from #700, #585 and #786 for testing, and a new addresses-scratch-3.json with the addresses of the deployed contracts.

[codecov]

Codecov Report

Patch coverage: 98.54% and project coverage change: +2.34 🎉

Comparison is base (1a1878f) 91.59% compared to head (0e3ed90) 93.94%.

❗ Current head 0e3ed90 differs from pull request most recent head 7bfe211. Consider uploading reports for the commit 7bfe211 to get more accurate results

Additional details and impacted files

@@            Coverage Diff             @@
##              dev     #800      +/-   ##
==========================================
+ Coverage   91.59%   93.94%   +2.34%     
==========================================
  Files          42       49       +7     
  Lines        1999     2428     +429     
  Branches      361      434      +73     
==========================================
+ Hits         1831     2281     +450     
+ Misses        168      147      -21     

Flag	Coverage Δ
unittests	93.94% <98.54%> (+2.34%)	⬆️

Flags with carried forward coverage won't be shown. Click here to find out more.

Impacted Files	Coverage Δ
contracts/staking/Staking.sol	96.69% <96.57%> (+0.41%)	⬆️
contracts/discovery/GNS.sol	98.98% <97.40%> (+9.79%)	⬆️
contracts/staking/StakingExtension.sol	97.41% <97.41%> (ø)
contracts/curation/Curation.sol	100.00% <100.00%> (ø)
contracts/discovery/L1GNS.sol	100.00% <100.00%> (ø)
contracts/gateway/L1GraphTokenGateway.sol	100.00% <100.00%> (ø)
contracts/governance/Managed.sol	98.24% <100.00%> (+3.70%)	⬆️
contracts/l2/curation/L2Curation.sol	100.00% <100.00%> (ø)
contracts/l2/discovery/L2GNS.sol	100.00% <100.00%> (ø)
contracts/l2/staking/L2Staking.sol	100.00% <100.00%> (ø)
... and 4 more

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