Add keys for rti-connext-dds-7.3.0.

[nuclearsandwich]

Available for both Ubuntu Noble amd64 and arm64. Unlike previous releases where we used an empty package for arm64.

Please add the following dependency to the rosdep database.

Package name:

rti-connext-dds-7.3.0

Package Upstream Source:

Sourced from the RTI APT repository imported into ros_bootstrap.

Purpose of using this:

Updated package for a ROS 2 middleware implementation.

Distro packaging links:

Links to Distribution Packages

https://community.rti.com/static/documentation/connext-dds/current/doc/manuals/debian_packages/repo.html

[github-actions]

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For changes related to rosdep:

• ✅ New rosdep keys are named appropriately
• ✅ Platforms for new rosdep rules are valid

For changes related to yamllint:

• ✅ All new lines of YAML pass linter checks

[christophebedard]

Should we close #44918?

[nuclearsandwich]

Should we close #44918?

Actually, that PR is probably closer to what needs to happen as it uses the custom -ros package rather than the official RTI debs. (The -ros deb includes the non-commercial license).

[github-actions]

This PR hasn't been activity in 14 days. If you are still are interested in getting it merged please provide an update. Otherwise it will likely be closed by a rosdistro maintainer following our contributing policy. It's been labeled "stale" for visibility to the maintainers. If this label isn't appropriate, you can ask a maintainer to remove the label and add the 'persistent' label.

[emersonknapp]

Closing in favor of #44918 which has been merged. If I've misread the situation, let me know!