LLMQContext uses RAII to initialize all members. Ensured that all
members always initialized correctly in proper order if LLMQContext
exists.
BlockAssembler, CChainState use too many agruments and they are making
wrong assumption that members of LLMQContext can be constructed and used
independently, but that's not true. Instead, let's pass LLMQContext
whenever possible.
## Issue being fixed or feature implemented
https://github.com/dashpay/dash-issues/issues/52
## How Has This Been Tested?
Run unit/functional test and introduce no breaking changes.
## Checklist:
- [x] I have performed a self-review of my own code
- [x] I have made corresponding changes to the documentation
- [x] I have assigned this pull request to a milestone
* llmq: move initialization logic to 'LLMQContext', add unique pointer to NodeContext
* llmq: add aliases to LLMQ globals, expose them to RPC via LLMQContext
* rpc: replace most global invocations with LLMQContext aliases
* rpc: replace quorum RPC global invocations with LLMQContext aliases
* llmq: replace individual global member arguments with context pointer
* llmq: pass aliased context pointer instead of individual globals in tests
* llmq: move BLS worker to LLMQContext, remove global
* llmq: move DKG debug manager to LLMQContext, remove global
* llmq: move DKG session manager to LLMQContext, remove global
* llmq: move quorum share manager to LLMQContext, remove global
* llmq: move quorum signing manager to LLMQContext, remove global
