Use github macos-14-arm64 runners instead of self-hosted

[fabinsch]

No description provided.

[fabinsch]

1. I deactivated julia for macos-14 as it could not be installed via conda.

2. currently, the ros TSID-downstream CI is failing because we are not able to install eigenpy:

2024-03-06T22:07:42.1334177Z ##[group]�[34minstall_downstream_dependencies�[0m
2024-03-06T22:07:42.1334624Z 
2024-03-06T22:07:42.1335922Z �[1m$ ( source /root/target_ws/install/setup.bash && rosdep install -q --from-paths /root/downstream_ws/src --ignore-src -y | grep -E '(executing command)|(Setting up)' ; )�[0m
2024-03-06T22:07:42.1337666Z ERROR: the following packages/stacks could not have their rosdep keys resolved
2024-03-06T22:07:42.1338477Z to system dependencies:
2024-03-06T22:07:42.1339022Z tsid: No definition of [eigenpy] for OS version [jammy]
2024-03-06T22:07:42.1340010Z eiquadprog: No definition of [ament_cmake] for OS version [jammy]
2024-03-06T22:07:42.1342125Z �[31m'( source /root/target_ws/install/setup.bash && rosdep install -q --from-paths /root/downstream_ws/src --ignore-src -y | grep -E '(executing command)|(Setting up)' ; )' returned with 1�[0m
2024-03-06T22:07:42.1344639Z ##[endgroup]
2024-03-06T22:07:42.1345396Z �[31m'install_downstream_dependencies' returned with code '1' after 0 min 1 sec�[0m
2024-03-06T22:07:42.1436082Z Post job cleanup.