EPIC: Jenkins maintenance

Creating this as an umbrella to tie all the jenkins activities together:

- [ ] [Ongoing - #lts updates](https://github.com/adoptium/infrastructure/issues/3376)
- [ ] https://github.com/adoptium/infrastructure/issues/3214
- [x] [Improve management of jenkins "jobs" disk usage](https://github.com/adoptium/infrastructure/issues/3285)
- [x] https://github.com/adoptium/infrastructure/issues/3379
- [x] https://github.com/adoptium/infrastructure/issues/3384
- [ ] https://github.com/adoptium/infrastructure/issues/3385
- [ ] https://github.com/adoptium/infrastructure/issues/3400
- [ ] https://github.com/adoptium/infrastructure/issues/3442
- [ ] https://github.com/adoptium/infrastructure/issues/3491
- [ ] https://github.com/adoptium/infrastructure/issues/3500
- [ ] https://github.com/adoptium/infrastructure/issues/3409
- [ ] https://github.com/adoptium/infrastructure/issues/3622

- [ ] https://github.com/adoptium/infrastructure/issues/3811
- [ ] https://github.com/adoptium/infrastructure/issues/3028
- [ ] https://github.com/adoptium/infrastructure/issues/4164 (OOM kill)
- [ ] https://github.com/adoptium/infrastructure/issues/4364 (More memory/heap issues)
- [ ] https://github.com/adoptium/infrastructure/issues/4384

### Log warnings (=Potential security issues)

- [ ] https://github.com/adoptium/infrastructure/issues/2774
- [x] https://github.com/adoptium/infrastructure/issues/3469
- [x] https://github.com/adoptium/infrastructure/issues/3485
- [x] https://github.com/adoptium/infrastructure/issues/3486
- [x] https://github.com/adoptium/infrastructure/issues/3487
- [ ] https://github.com/adoptium/infrastructure/issues/3496
- [ ] https://github.com/adoptium/infrastructure/issues/3514
- [ ] https://github.com/adoptium/infrastructure/issues/3645

Start by reviewing the linked open issues, especially #3376, #3214, #3385, #3400, #3442, #3491, #3500, #3409, #3622, #3811, #3028, #4164, #4364, #2774, #3496, #3514, and #3645. Done requires resolving the outstanding Jenkins maintenance items tracked by this umbrella issue.

Written by the indexing model from the issue text.