feat: cherrypicking withdrawl enhancements to v6

[spoo-bar]

Cherrypicking the three relevant PRs regarding withdrawl enhancements

• https://github.com/archway-network/archway/pull/475
• https://github.com/archway-network/archway/pull/502
• https://github.com/archway-network/archway/pull/462

Regenerating swagger file as there are proto changes now

[codecov[bot]]

Codecov Report

All modified and coverable lines are covered by tests :white_check_mark:

:exclamation: No coverage uploaded for pull request base (releases/6.x.x@8686007). Click here to learn what that means.

Additional details and impacted files

```diff @@ Coverage Diff @@ ## releases/6.x.x #535 +/- ## ================================================= Coverage ? 65.90% ================================================= Files ? 64 Lines ? 3916 Branches ? 0 ================================================= Hits ? 2581 Misses ? 1207 Partials ? 128 ```

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