Clean up home file system on jenkins master

[sxa]

Mostly the stuff in there is down to me, so it's time for a cleanup.
A lot of the space is taken from backups of stuff that I took before permanently wiping it.

• jenkins/.jenkins/userContent (27GB - needs to be kept!)
• sxa/sxa-openjdk21-pipeline-eatests (40GB)
• jenkins/.jenkins/secure-infra2108 (48GB) (Related to Secure the public Jenkins server #2108) (Removed tarballs for obsolete_generators, old adoptium-package-linux, sxa_jobs)
• jenkins/.jenkins/config-history (80GB - 76GB in avaposse.jobdsl.plugin.ExecuteDslScripts subdirectory)
• jenkins/.jenkins/userContent-MOVED (🤷🏻 - a couple of temp things from 2023, the rest from Sept 2021)
• jenkins/sxabackupsjenkins/sxabackups (62GB from March 2022 of which FULL-2022-03-30_13-39 is 26GB and 34GB is a userContent.tar)
• diskspace/deleteables - 79Gb of tarballed pipelines from the GA clearout earlier this year

[sxa]

28464388	./home/jenkins/.jenkins/userContent
29678824	./home/jenkins/.jenkins/secure-infra2108/adoptium-packages-linux-pipeline
34532308	./home/jenkins/.jenkins/userContent-MOVED
35384148	./home/jenkins/.jenkins/secure-infra2108
64174792	./home/jenkins/sxabackups
78324508	./home/jenkins/.jenkins/config-history/javaposse.jobdsl.plugin.ExecuteDslScripts
79284152	./home/jenkins/diskspace/deletables
81704196	./home/jenkins/.jenkins/config-history
208518180	./home/jenkins/.jenkins
354596688	./home/jenkins
418194652	./home