ci: build write-capable-build on ros-base too

[bburda]

Pull Request

Summary

opcua-plugin.yml's write-capable-build job still ran on ubuntu:noble with the "Install Git", "Pre-install ROS 2 apt source" and "Set up ROS 2 Jazzy" steps, and the ros-apt-source composite action the second step used no longer exists since the other container jobs moved to ros:<distro>-ros-base. The job fails at that step on every run of the workflow on main, and on every pull request that triggers it.

The job now runs on ros:jazzy-ros-base like its siblings, the three steps are gone, and "Install ccache" runs its own apt-get update first, because the ros-base images ship without an apt index.

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Issue

No issue. This is a one-file repair of a job the ros-base migration on main left behind.

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Type

• Bug fix
• New feature or tests
• Breaking change
• Documentation only

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Testing

• The write-capable-build job of the OPC-UA Plugin Integration workflow is the test: it is red on main and must be green on this branch.
• Locally: the workflow parses, the job's container image is ros:jazzy-ros-base, its step list no longer contains the three removed steps, and no workflow file references ros-apt-source or setup-ros any more.

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Checklist

• Breaking changes are clearly described (and announced in docs / changelog if needed)
• Tests were added or updated if needed
• Docs were updated if behavior or public API changed