InstantUndelegate

[UnityChaos]

Description

Add InstantUndelegate keeper method to x/staking. For use in superfluid.

Closes: #XXXX

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Author Checklist

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please add links to any relevant follow up issues.

I have...

• included the correct type prefix in the PR title
• added ! to the type prefix if API or client breaking change
• targeted the correct branch (see PR Targeting)
• provided a link to the relevant issue or specification
• followed the guidelines for building modules
• included the necessary unit and integration tests
• added a changelog entry to CHANGELOG.md
• included comments for documenting Go code
• updated the relevant documentation or specification
• reviewed "Files changed" and left comments if necessary
• confirmed all CI checks have passed

Reviewers Checklist

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your handle next to the items reviewed if you only reviewed selected items.

I have...

• confirmed the correct type prefix in the PR title
• confirmed ! in the type prefix if API or client breaking change
• confirmed all author checklist items have been addressed
• reviewed state machine logic
• reviewed API design and naming
• reviewed documentation is accurate
• reviewed tests and test coverage
• manually tested (if applicable)

[codecov-commenter]

Codecov Report

Merging #117 (0ee3ff0) into v0.45.0x-osmo-v7 (f432981) will decrease coverage by 0.00%.
The diff coverage is 64.70%.

@@                 Coverage Diff                  @@
##           v0.45.0x-osmo-v7     #117      +/-   ##
====================================================
- Coverage             61.02%   61.02%   -0.01%     
====================================================
  Files                   588      588              
  Lines                 37840    37840              
====================================================
- Hits                  23091    23090       -1     
+ Misses                12785    12783       -2     
- Partials               1964     1967       +3     

Impacted Files	Coverage Δ
x/staking/keeper/delegation.go	70.51% <64.70%> (-0.22%)	⬇️
store/iavl/store.go	59.84% <0.00%> (-6.10%)	⬇️
x/staking/keeper/hooks.go	30.00% <0.00%> (-0.77%)	⬇️
x/staking/keeper/slash.go	68.65% <0.00%> (-0.47%)	⬇️
store/rootmulti/store.go	68.61% <0.00%> (-0.03%)	⬇️
store/iavl/tree.go	87.50% <0.00%> (ø)
x/distribution/keeper/hooks.go	25.00% <0.00%> (+1.31%)	⬆️
x/staking/types/hooks.go	9.09% <0.00%> (+2.42%)	⬆️
crypto/keys/internal/ecdsa/privkey.go	83.78% <0.00%> (+2.70%)	⬆️
x/slashing/keeper/hooks.go	82.14% <0.00%> (+4.72%)	⬆️