docker: Automate deletion of docker static Jenkins nodes

[Haroon-Khel]

• [x] commit message has one of the standard prefixes
• [ ] faq.md updated if appropriate
• [x] other documentation is changed or added (if applicable)
• [ ] playbook changes run through VPC or QPC (if you have access)
• [x] VPC/QPC not applicable for this PR
• [ ] for inventory.yml changes, bastillion/nagios/jenkins updated accordingly

ref https://github.com/adoptium/infrastructure/issues/3506

The python script does most of the work; it deletes the node in Jenkins (if the node is idle). Ansible then looks up the machines names and ports in DockerInventory.json and removes the associated container on the dockerhost machine. The python script uses a jenkins username and api token, so these need to be added to the secrets repo.

[sxa]

Does this mean you got around the problems you were having with calling in from python?

[Haroon-Khel]

Docs update here https://github.com/adoptium/infrastructure/pull/3562

[sxa]

Docs update here #3562

Can the doc change be cherry-picked across to this PR? It would be nicer to have the doc update and the code change in one.

[Haroon-Khel]

Can the doc change be cherry-picked across to this PR? It would be nicer to have the doc update and the code change in one.

Done