feat: ana_2p2 output directory control

[c-dilks]

• add new argument outputDir to ana_2p2.java to allow custom output directories
• refactor detector classes in monitoring/ to use outputDir
  • their main methods default to plots[RUNNUM] (or plots if run 0), avoiding breaking anything that calls them; a separate PR could be made if output control is needed at that level
• proposed for merging into refactor!: unify wrappers and output files for workflow automation #73, but this will be a breaking change
  • likely only the CI build jobs will pass
  • the subsequent PR feat: add --swifjob option for use on runner nodes #95 fixes the breaking changes
• hard-coded /volatile directories are removed; use the new outputDir arguments if output to /volatile is desired