Fix test sources with latest cppcheck

[MNikoliCC]

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Description Fix cpp code to pass the test sources with latest cppcheck.

Tasks Add the list of tasks of this PR.

• [x] Fix cpp code issues

[MNikoliCC]

After reviewing the issue with latest cppcheck, I suggest not to make further changes at this time. Addressing the warnings would require adding const to a large number of methods, which involves verifying that each method does not modify any member variables of the passed object.

While it would be possible to add const indiscriminately to pass the checks, this approach may not be entirely safe or appropriate without thorough validation. Therefore, I'm opting to leave the current implementation as is.