feat: single node quorum

[knst]

Notes for reviewers

1. It depends on test: improve mine rotation quorums for IS in functional tests #6431, feat: dynamically register MN in functional tests without IS #6430 (these changes are included to this PR)
2. this PR is draft, because I am going to tidy-up code a bit, but I am looking for Concept Review
3. known issues: instead random key for each quorum it is used operator-key. I got difficulties to make it working and decided to exclude from scope of this PR.

Issue being fixed or feature implemented

Development for platform requires currently to have running 4 Dash Core instances: wallet and at least 3 Evo Nodes which forms quorum.
This issue has been partially addressed #6261 to let use only 2 Evo Nodes. Though, it still requires all DKG steps, heavy network communication and various instability.

What was done?

This PR introduced new type of quorum "Single Node Quorum" with name llmq_1_100 and id=111 for Regtest.

This quorum needs just one node to be formed.

While regular quorum with several nodes 7 steps of creation (Initialization, Contribution, Complaining, Justification, Commitment, Finalization, Mining) this type of quorum just from Initialization straight to the Finalization.

The signing process with this quorum is also simplified. So far as regular quorum requires to sign multiple shares, for single node quorum the messages are signed immediately by just one node.

How Has This Been Tested?

See a new functional test feature_llmq_singlenode.py
Also some other tests required changes, they are presented in prior commits

Breaking Changes

It introduces new quorum for Reg Test.

Checklist:

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

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[thephez]

Please open a PR to update https://github.com/dashpay/dips/blob/master/dip-0006/llmq-types.md when this PR is merged

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[DashCoreAutoGuix]

Guix Automation has completed; a release should be present here: https://github.com/dashpay/dash-dev-branches/releases/tag/v22.1.0-devpr6437.62360a30. The image should be on dockerhub soon.