Draft: Add legacy L1 jet RoIs to default PHYS. Add option for jFEX ones.

!73334 (merged) added the option to include the "legacy" L1 Jet RoIs (needed by some analyses for trigger matching) to DAOD_PHYS. A proposal to enable this inclusion by default was presented at the 13 September AMG meeting and agreed by the group (tagging @gwatts & @ekourlit for reference). So, this MR removes the flag which was previously gating the inclusion of these objects and replaces it with a check on the data year/MC campaign (since this legacy L1 system was used for primary triggers in Run 2 and Run 3 up to 2023).

This MR intentionally does not affect PHYSLITE; further work is needed to investigate possible size reductions first.

This MR also adds the jFEX ("Phase-I") RoIs, which are the equivalent for 2024 onward but use a different EDM. Since definitive size estimates haven't been presented to AMG yet, this is behind a flag (False by default) for now, as the legacy ones were prior to this MR.

Tagging @khoo and @tamartin - we may want to refactor some of this code in the near future (e.g. where we do the year check and slimming helper handling), but this is an effective and not-too-messy solution in the meantime so we've got something to work with.

@lshi might also be interested in this from the analysis side.