Additional standard library x/authz Authorizations

[aaronc]

Following up from #7105 (comment), it would be nice to have some more "standard library" Authorization types packaged with the SDK for x/authz, such as:

• x/gov voting authorizations
• composition structures like and and or

[clevinson]

At a minimum this means creating an authorization for MsgVote, and if there are others that are high priority, those can be added as well (basic things that can be done in gov & staking)

Ideas:

• MsgVote
• Delegate
• Unstake