Add hypo for time-significance based selection of HLT jets

(Replacement for !64732 (closed), since the fork that was based on does not have the right visibility settings. The starting point here already implements changes from comments by @lidiaz and @martindl in that MR)

This MR adds the TimeSignificanceCondition class to select delayed jets from decays of long-lived particles at the HLT based on the significance of their delay, as discussed in ATR-28103. To be developed further before being put into production, but once marked ready the additions in this should be possible to merge in without causing any problems.

Longer-term improvements most importantly would include picking parameters for pT-dependent time resolution from a db or similar (instead of hardcoded). Tagging @mapatzwa who did the implementation for his MSc thesis, and @xingguo and @miochoa as jet trigger signature coordinators (and @cantel who previously held this role).

Also tagging @sfyrla and @jmontejo for info, as they've done work on similar things recently.