…n faster

874ef8c fix: mine_quorum_no_checks -> mine_quorum_less_checks: do some checks to make sure quorums are mined correctly (UdjinM6)
4f636f4 fix: re-order functional tests: move governance to 60+seconds category (Konstantin Akimov)
fe49f3f refactor: removed dead and commented code from test_framework.py (Konstantin Akimov)
cd1958c perf: removed sleep(6) from mine_cycle_quorum in functional tests (Konstantin Akimov)
3f17a01 fix: bump mocktime in simplepose when generating blocks to improve robustness (Konstantin Akimov)
132d95e perf: remove sleep(1) from each step of quorum creation in functional tests (Konstantin Akimov)
4c57ad1 chore: increase batch size from 10 to 50 for faster block generation in functional tests (Konstantin Akimov)

Pull request description:

  ## Issue being fixed or feature implemented
  Functional tests take too long time to run.

  (PR is recreated from #6268 because CI is broken)

  ## What was done?
   - increased robustness `feature_llmq_simplepose.py` by adding missing bump for mocktime during block generations
   - removed sleep(1) from each stage of mine_quorum
   - removed sleep(6) from final stage of mine_cycled_quorum
   - size of batch for block generation in `feature_asset_locks.py` and in `activate_fork_by_name()` increased from 10 blocks to 50 blocks
   - moved governance's functional tests to "60 seconds+" category because they always the last one to wait if running more than 10 jobs at once
  Plus extra refactoring which removes dead and commented code from test_framework.py

  ## How Has This Been Tested?
  Locally, the functional tests speed up with these fixes for 15% for overall time and 20% for accumulated time
  `test/functional/test_runner.py -j20`

  Before:
  ```
  ALL                                                | ✓ Passed  | 7860 s (accumulated)
  Runtime: 481 s
  ```

  After:
  ```
  ALL                                                | ✓ Passed | 6237 s (accumulated)
  Runtime: 416 s
  ```

  ---
  CI tsan job speeds up for 5 minutes in absolute time (~5%) and 1000 seconds in accumulated time.
  ```
  ALL                                                | ✓ Passed  | 23854 s (accumulated)
  Runtime: 6249 s
  ```
  ↑ [old version](https://gitlab.com/dashpay/dash/-/jobs/7822664869) vs [new version](https://gitlab.com/dashpay/dash/-/jobs/7825461091) ↓
  ```
  ALL                                                | ✓ Passed  | 22901 s (accumulated)
  Runtime: 5962 s
  ```

  ## 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
  - [x] I have made corresponding changes to the documentation
  - [x] I have assigned this pull request to a milestone

ACKs for top commit:
  UdjinM6:
    utACK 874ef8c
  PastaPastaPasta:
    utACK 874ef8c

Tree-SHA512: 514fa2fb32abd59c90f63b68fccc8c3d3b6d16b0b6ad7459c4a348825815e7d3012177565dea1f70b8a1f28ede1a297f91361365454d1be85955e77260451cf5