ENH: writeObjects: add flag to report registered objects

Summary

This update introduces a Boolean flag to report registered objects without writing objects, which could be useful for debugging purposes.

Details of new models

A typical example of the new keyword is as follows:

writeObjects1
{
    // Optional entries
    writeOption   log;
    ...
}

This then reports the existing objects in the simulation registry to the output stream.

Risks

No change in existing input/output.

Metadata

• EP2578
• linux64ClangDPInt32Opt (clang15)
• linux64GccDPInt32Opt
• linux64GccSPDPInt64Debug
• Alltest: No new error/No change in existing output