[conductor] Fix test race condition

[0x00101010]

Description
Fix test race condition.

The race condition happens during shutdown phase instead of during initialization / startup phase.

The deadlock happens when prior tests tries to shutdown conductor, calls

if s.syncEnabled {
  s.wg.Add(1)
  s.next <- struct{}{}
}
s.NoError(s.conductor.Stop(s.ctx))
s.True(s.conductor.Stopped())

s.conductor.Stop(s.ctx) should've stopped the inner action for loop, and if it was stopped before the last step was executed, then the s.wg.Done() won't be called. However since we're reusing the same wg across tests before this, the next test hangs immediately since the wg starts from 1 instead of 0.

This fix creates a new wg for every test so that even if there's issue with prior test, new test would be able to continue working as it should

Tests
Re-enabled prior test

Additional context
Fixes #13276

Metadata

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 43.03%. Comparing base (4c88138) to head (bf19246).
Report is 1 commits behind head on develop.

Additional details and impacted files

@@             Coverage Diff             @@
##           develop   #13314      +/-   ##
===========================================
- Coverage    47.03%   43.03%   -4.00%     
===========================================
  Files          927      758     -169     
  Lines        77983    68221    -9762     
  Branches       849        0     -849     
===========================================
- Hits         36682    29362    -7320     
+ Misses       38620    36383    -2237     
+ Partials      2681     2476     -205     

Flag	Coverage Δ
cannon-go-tests-32	?
cannon-go-tests-64	?
contracts-bedrock-tests	?

Flags with carried forward coverage won't be shown. Click here to find out more.

Files with missing lines	Coverage Δ
op-conductor/conductor/service.go	60.31% <100.00%> (+60.31%)	⬆️

... and 180 files with indirect coverage changes