Slash amounts support

[maurolacy]

Related to osmosis-labs/mesh-security-sdk#125.

Adds support for slashing based on historical evidence (double signing slashing), through slashing amounts instead of slash ratios.

There are still some limitations and there's room for improvement in the contracts side impls. Will be documented in a number of follow-up issues.

TODO:

• Fix / adapt / extend tests.
• Improve coverage / Add tests.

[JakeHartnell]

🎉

[JakeHartnell]

Needs test fixes but otherwise looks good. Sorry for the earlier approval. 😂

[maurolacy]

Needs test fixes but otherwise looks good. Sorry for the earlier approval. 😂

Welcome. Yes, I'll continue working on this asap.

[codecov-commenter]

Codecov Report

Attention: 98 lines in your changes are missing coverage. Please review.

Comparison is base (4402153) 86.71% compared to head (1080a83) 86.26%.

Files	Patch %	Lines
contracts/consumer/converter/src/contract.rs	1.26%	78 Missing ⚠️
contracts/consumer/virtual-staking/src/contract.rs	90.65%	2 Missing and 8 partials ⚠️
contracts/consumer/converter/src/ibc.rs	0.00%	3 Missing ⚠️
...ontracts/provider/external-staking/src/contract.rs	97.70%	1 Missing and 2 partials ⚠️
contracts/provider/external-staking/src/ibc.rs	0.00%	2 Missing ⚠️
...ontracts/consumer/virtual-staking/src/multitest.rs	0.00%	1 Missing ⚠️
packages/apis/src/converter_api.rs	0.00%	0 Missing and 1 partial ⚠️

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Additional details and impacted files

@@            Coverage Diff             @@
##             main     #179      +/-   ##
==========================================
- Coverage   86.71%   86.26%   -0.45%     
==========================================
  Files          81       81              
  Lines       14035    14253     +218     
  Branches    14035    14253     +218     
==========================================
+ Hits        12170    12295     +125     
- Misses       1288     1389     +101     
+ Partials      577      569       -8     

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