Add rosdep_repo_check as part of meta-ros CI checks

[robwoolley]

The ROS infrastructure includes a rosdep_repo_check script to automate checking the entries in the rosdep YAML files.

This pull request adds support to the script for checking the OpenEmbedded entries against the OE Layer Index: https://github.com/ros/rosdistro/pull/40021

Add this as a step in the meta-ros CI system.