[22575]: Make the machine id the physical data host info

[juanjo4936]

This PR modifies the info that gets fed into the fastdds.physical_data host element, the machine id instead of the host id as it was before.

Contributor Checklist

• Commit messages follow the project guidelines.
• The code follows the style guidelines of this project.
• Tests that thoroughly check the new feature have been added/Regression tests checking the bug and its fix have been added; the added tests pass locally
• Any new/modified methods have been properly documented using Doxygen.
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• N/A New feature has been added to the versions.md file (if applicable).
• New feature has been documented/Current behavior is correctly described in the documentation.
• N/A Applicable backports have been included in the description.

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