perf: reduced delays and syncs in functional tests to run faster

[knst]

Issue being fixed or feature implemented

Functional tests take too long time to run.

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 vs new version ↓

ALL                                                | ✓ Passed  | 22901 s (accumulated) 
Runtime: 5962 s

Breaking Changes

N/A

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

[UdjinM6]

feature_llmq_simplepose.py starts to fail much more often for me locally after d561419 (when running 8 of them in parallel). 5d4301d7156f140d5e5809fb2de6bae271160ec7 f72a70e fixes that.

[PastaPastaPasta]

re-request with udjin applied

[UdjinM6]

Looks like we are getting different results here, my commit makes things a bit less stable for knst for some reason. @PastaPastaPasta pls confirm the issue (and that my commit actually helps).

[knst]

Looks like we are getting different results here, my commit makes things a bit less stable for knst for some reason.

on laptop udjin's patch continue to fail, but on PC (different kernel version, different hardware, same compiler) it doesn't fail that much.

Let's see how CI behaves