Refactor gov+PoS joint logic

[brentstone]

Describe your changes

Several refactors are performed that related to the interplay between governance and PoS. Closes #2796. Closes #1125.

• Restrict voting in governance to prohibit jailed and inactive validators
• Refactor finding all validators to which an account has delegations (instead of iteration over bonds, store this data)

TODO:

• test for validator targets

Indicate on which release or other PRs this topic is based on

based on #2877, which is based on v0.32.0

Checklist before merging to draft

• I have added a changelog
• Git history is in acceptable state

[Fraccaman]

some e2e tests are not passing

[brentstone]

Split out into multiple PRs:

• Optimize find delegation validators #3043
• Prohibit governance voting from jailed and inactive validators #3004