Context:

• ReturnCode is a class to handle return codes in dev-utils
• ReturnCodeValue is an enum defined inside ReturnCode, thus it is also in dev-utils
• ReturnCode_t is an enum containing return codes defined in fastdds

Adding comparison operator useful in switch or if else code blocks. Currently, the comparisons of the type

ReturnCode A == ReturnCode::RETCODE_X (This is actually of type ReturnCodeValue)

are implicitly calling the constructor

ReturnCode::ReturnCode(const fastdds::dds::ReturnCode_t& value)

for the right operand of the equality.

This can lead to issues since that constructor is not designed for variables of the type ReturnCodeValue but it is still called since both enums fall back to integers.

A new constructor from type ReturnCodeValue has been added to mitigate this issue

These are the artifacts generated using this patch on eprosimaCI:

• FastDDS: https://github.com/eProsima/eProsima-CI/actions/runs/20877655060 (should not be needed but may be convenient for having an artifact with the correct name)
• DevUtils: https://github.com/eProsima/eProsima-CI/actions/runs/20848428203
• DDSPipe: https://github.com/eProsima/eProsima-CI/actions/runs/20877688790

Note they all use the suffix "_devutils_retcode_patch"

These are the CI's of the tools that depend on DevUtils running over those artifacts

• DDSPipe: https://github.com/eProsima/DDS-Pipe/actions/runs/20878338498 (OK)
• DDSRouter: https://github.com/eProsima/DDS-Router/actions/runs/20883380087 (OK)
• Fast DDS Spy: https://github.com/eProsima/Fast-DDS-spy/actions/runs/20917933468 (OK)
• Fast DDS Statistics Backend: https://github.com/eProsima/Fast-DDS-statistics-backend/actions/runs/20877556296 (OK, docs have nothing to do with this PR)
• Fast DDS Monitor: - does not have tests -
• Fast DDS Record and Replay: https://github.com/eProsima/DDS-Record-Replay/actions/runs/20883351480 (OK, the error is unrelated)