Add a new test test_trigP1_v1Dev_newJO_grid.py comparing CA to legacy over a larger set of events than the build test - ATR-27049
Test runs first the legacy to create the reference, rather than needing to compare to other tests or having a reference stored in the release.
Several points to discus before merging:
The count comparison is set as required but from testing it will be blocked by ATR-28477 so will currently fail. We want the result checked though, so believe this is the easiest way for shifters to notice/report the difference.
The legacy part of the test duplicates test_trigP1_v1Dev_grid.py so this test could be removed either now or in the near future.
The test is new so will need references generating for rootcomp.
This test runs athenaHLT on data, do we want to do similar for MC?
