Draft: migration of PHYSLITE to the component accumulator

This MR is an attempt to migrate PHYSLITE to the component accumulator. This is proving tricky because the analysis sequences aren't compatible with the component accumulator, so some wrangling is required. Concretely the following changes are required:
- The DualUseConfig can now return a new-style configurable (GaudiConfig2)
- AnaAlgSequence is given a new member, being a list to hold any GaudiConfig2 components that can't be appended directly to the sequence (which is old-style). Currently the old-style sequence isn't used directly but is instead iterated over and each component added to a new-style sequence before being added to the component accumulator
- New config fragment to allow the calo cell thininng
- PHYSLITE job options themselves