Modernize CMakeLists.txt ECFLOW-1923

[marcosbento]

Modernize CMakeLists.txt for Core

• Move generated header files to CMAKE_BINARY_DIR to avoid having changes on the working directory (dirty repository)
• Setup Boost.unit_test_framework as header only library
• Create a specific entry point for the test driver
  • by convention, named Test_main.cpp

[codecov-commenter]

Codecov Report

All modified and coverable lines are covered by tests ✅

Comparison is base (a300b98) 83.55% compared to head (aa7c5f8) 83.55%.

Additional details and impacted files

@@           Coverage Diff            @@
##           develop      #49   +/-   ##
========================================
  Coverage    83.55%   83.55%           
========================================
  Files          539      539           
  Lines        52524    52525    +1     
========================================
+ Hits         43884    43886    +2     
+ Misses        8640     8639    -1     

Files	Coverage Δ
ACore/test/TestFile.cpp	99.10% <ø> (ø)
ACore/test/TestNodePath.cpp	92.72% <ø> (ø)
ANattr/test/TestAttrSerialization.cpp	100.00% <ø> (ø)
ANode/parser/test/TestParser.cpp	91.01% <ø> (+0.10%)	⬆️
ANode/test/TestExprParser.cpp	98.16% <ø> (ø)
Base/test/TestResolveDependencies.cpp	100.00% <ø> (ø)
CSim/test/TestSimulator.cpp	91.17% <ø> (ø)
Client/test/TestClientEnvironment.cpp	100.00% <ø> (ø)
Http/test/TestApiV1.cpp	95.49% <ø> (ø)
Server/test/TestServerEnvironment.cpp	96.79% <ø> (ø)

... and 1 file with indirect coverage changes

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