Implement CopyableMutex and CopyableAtomic

[joka921]

They behave like std::mutex and std:atomic but also have copy constructor and copy assignment. For CopyableAtomic the current value is copied, for CopyableMutex the copy constructor copies nothing and the copy assignment is a noop.

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 89.14%. Comparing base (14d6e1c) to head (992e670).
Report is 2 commits behind head on master.

Additional details and impacted files

@@            Coverage Diff             @@
##           master    #1398      +/-   ##
==========================================
+ Coverage   89.06%   89.14%   +0.08%     
==========================================
  Files         328      333       +5     
  Lines       29294    29500     +206     
  Branches     3262     3291      +29     
==========================================
+ Hits        26090    26298     +208     
+ Misses       2054     2051       -3     
- Partials     1150     1151       +1     

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[hannahbast]

1-1 with Johannes via the Atlantic, minor changes

[hannahbast]

Minor reformatting left

[sonarcloud]

Quality Gate passed

Issues
2 New issues
0 Accepted issues

Measures
0 Security Hotspots
0.0% Coverage on New Code
0.0% Duplication on New Code

See analysis details on SonarCloud