Merge dashpay#6076: refactor: use new type of composite commands for governance NNN

91aae7b refactor: use properly RPCHelpMan for governance RPC getsuperblockbudget (Konstantin Akimov)
e92e5ef refactor: use properly RPCHelpMan for governance RPC voteraw (Konstantin Akimov)
87b3011 refactor: duplicated code between governance RPC list and diff (Konstantin Akimov)
faa6179 docs: move comments from the old code to the new implementation of governance RPC (Konstantin Akimov)
39cd5e4 fix: format code for rpc governance (Konstantin Akimov)
0062421 refactor: use new style of composite commands for RPC gobject NNN (Konstantin Akimov)
42e0b37 refactor: use properly RPCHelpMan for governance RPC getgovernanceinfo (Konstantin Akimov)

Pull request description:

  ## Issue being fixed or feature implemented
  See dashpay#6051

  ## What was done?
  Commands starting from 'governance ...' uses new a new way to make composite commands.

  This PR includes also a refactoring to remove common code between `gobject list` and `gobject diff`
  This PR includes also a refactoring to properly use RPCHelpMan for remaining governance's RPC.

  ## How Has This Been Tested?
  Run unit/functional tests.

  ## Breaking Changes
  N/A

  ## Checklist:
  - [x] I have performed a self-review of my own code
  - [x] I have commented my code, particularly in hard-to-understand areas
  - [x] I have added or updated relevant unit/integration/functional/e2e tests
  - [ ] I have made corresponding changes to the documentation
  - [x] I have assigned this pull request to a milestone

ACKs for top commit:
  UdjinM6:
    utACK 91aae7b
  PastaPastaPasta:
    utACK 91aae7b

Tree-SHA512: 46c00df924a7d2c5af799c605bfc479034019eed346f9d487827b0688993aa712ba3dc528d9bdd09b64f0e07b6940078337ca1baf0a1355f87eb792406c676ca

Author: PastaPastaPasta