Fixed tests and removed Garden jobs (#112) #591

Job	Run time
Unit testing action on GitHub runners (ubuntu-20.04)	44s
Unit testing action in a docker container (ubuntu:focal)	25s
Install Gazebo on Ubuntu GitHub runner (ubuntu-20.04, citadel)	1m 55s
Unit testing action on GitHub runners (ubuntu-22.04)	26s
Install Gazebo on macOS (macos-13)	17m 10s
Unit testing action in a docker container (ubuntu:jammy)	21s
Unit testing action on GitHub runners (ubuntu-24.04)	23s
Install Gazebo on Ubuntu GitHub runner (ubuntu-20.04, fortress)	1m 49s
Install Gazebo on macOS (macos-14)	33m 9s
Unit testing action in a docker container (ubuntu:noble)	25s
Install Gazebo on Ubuntu GitHub runner (ubuntu-22.04, harmonic)	1m 23s
Install Gazebo on Ubuntu GitHub runner (ubuntu-24.04, harmonic)	1m 21s
Install Gazebo nightly on Ubuntu docker	1m 30s
Install Gazebo on Ubuntu docker (ubuntu:focal, citadel)	2m 24s
Install Gazebo on Ubuntu GitHub runner (ubuntu-24.04, ionic)	1m 14s
Install Gazebo pre-release on Ubuntu docker (ubuntu:jammy)	1m 54s
Install Gazebo on Ubuntu docker (ubuntu:focal, fortress)	1m 28s
Install Gazebo pre-release on Ubuntu docker (ubuntu:noble)	1m 23s
Install Gazebo on Ubuntu docker (ubuntu:jammy, harmonic)	1m 15s
Install Gazebo on Windows	6m 46s
Install Gazebo on Ubuntu docker (ubuntu:noble, harmonic)	1m 13s
Install Humble and Fortress side-by-side	3m 42s
Install Gazebo on Ubuntu docker (ubuntu:noble, ionic)	1m 49s
Install Iron and Harmonic side-by-side	4m 24s
Install Harmonic on Jazzy through vendor packages	4m 10s
	1h 32m 43s

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