Add 2402 Hetzner Machines

[ryanaslett]

Adds them to the inventory

Will work on the required Ansible changes in this PR.

[richardlau]

FTR the playbook fails with:

TASK [benchmarking : create custom jenkins workspace] ***********************************************************************************************************************************************************
task path: /home/rlau/sandbox/github/build/ansible/roles/benchmarking/tasks/main.yml:6
fatal: [test-hetzner-ubuntu2404-x64-1]: FAILED! => {"changed": false, "gid": 0, "group": "root", "mode": "0755", "msg": "chown failed: failed to look up user iojs", "owner": "root", "path": "/w/bnch-comp", "size": 4096, "state": "directory", "uid": 0}

PLAY RECAP ******************************************************************************************************************************************************************************************************
test-hetzner-ubuntu2404-x64-1 : ok=17   changed=0    unreachable=0    failed=1    skipped=19   rescued=0    ignored=0

which might be a sequencing thing with how the roles are done (the benchmarking role probably needs to depend on or invoke user-create.

[richardlau]

Will work on the required Ansible changes in this PR.

Actually changed my mind. I'll open a separate pull request to keep the changes separate.