Add tests for language's node processors for checkpointing

src/language/node_processor/ASTNodeListProcessor.hpp

src/language/node_processor/DoWhileProcessor.hpp

src/language/node_processor/ForProcessor.hpp

src/language/node_processor/IfProcessor.hpp

src/language/node_processor/WhileProcessor.hpp

tests/CMakeLists.txt

tests/test_BuiltinFunctionProcessor.cpp

tests/test_ConcatExpressionProcessor.cpp

tests/test_DoWhileProcessor.cpp

tests/test_ForProcessor.cpp

tests/test_FunctionProcessor.cpp

tests/test_IfProcessor.cpp

tests/test_WhileProcessor.cpp

tests/test_checkpointing_Resume.cpp