Remove usage of mutex in TQueue and SelfEvent

[alkino]

As the pool underneath is already mutexed (MutexPool), no one mutex TQueue or SelfQueue.

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 67.14%. Comparing base (17be061) to head (6dd9aef).

Additional details and impacted files

@@           Coverage Diff           @@
##           master    #2758   +/-   ##
=======================================
  Coverage   67.14%   67.14%           
=======================================
  Files         561      561           
  Lines      104145   104114   -31     
=======================================
- Hits        69930    69911   -19     
+ Misses      34215    34203   -12     

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[azure-pipelines]

✔️ 22e2ad2 -> Azure artifacts URL

[azure-pipelines]

✔️ 8ea4836 -> Azure artifacts URL

[azure-pipelines]

✔️ 4ec3ee5 -> Azure artifacts URL

[sonarcloud]

Quality Gate passed

Issues
10 New issues
0 Accepted issues

Measures
0 Security Hotspots
No data about Coverage
0.0% Duplication on New Code

See analysis details on SonarCloud

[azure-pipelines]

✔️ 6dd9aef -> Azure artifacts URL

[bbpbuildbot]

Logfiles from GitLab pipeline #200861 (:white_check_mark:) have been uploaded here!

Status and direct links:

• ✅ mac_m1_cmake_build: [cmake, ON, OFF, OFF, address]
• ✅ spack_setup
• ✅ build:nmodl
• ✅ build:neuron:nmodl:intel:legacy
• ✅ build:neuron:nmodl:intel:shared
• ✅ build:neuron:nmodl:nvhpc:acc:legacy
• ✅ build:neuron:nmodl:nvhpc:acc:shared
• ✅ build:neuron:nmodl:nvhpc:omp:legacy
• ✅ build:neuron:nmodl:nvhpc:omp
• ✅ test:neuron:nmodl:intel:legacy
• ✅ test:neuron:nmodl:intel:shared
• ✅ test:neuron:nmodl:nvhpc:acc:legacy
• ✅ test:neuron:nmodl:nvhpc:acc:shared
• ✅ test:neuron:nmodl:nvhpc:omp:legacy
• ✅ test:neuron:nmodl:nvhpc:omp