Remove dual ROS 1+2 devcontainer, remove ROS Galactic from the support matrix

[jhurliman]

Public-Facing Changes

• ROS Galactic support has been dropped from the support matrix

Description

In anticipation of adding ROS 2-specific functionality that relies on ROS Humble or later, ROS Galactic has been removed from the support matrix. The dual ROS 1+2 devcontainer has been replaced with a ROS 2 Humble devcontainer that matches what is used in CI.

[achim-k]

In anticipation of adding ROS 2-specific functionality that relies on ROS Humble or later, ROS Galactic has been removed from the support matrix.

Does that mean that your anticipated changes will prevent users from manually building foxglove_bridge for galactic?

[jhurliman]

In anticipation of adding ROS 2-specific functionality that relies on ROS Humble or later, ROS Galactic has been removed from the support matrix.

Does that mean that your anticipated changes will prevent users from manually building foxglove_bridge for galactic?

Yes, that's correct. Once ros2_babel_fish code is vendored into this repo, anyone trying to build ros-foxglove-bridge against a ROS 2 release before Humble will see compilation errors about trying to call methods that don't exist.