Tweaks for hlt2_pp_2024 throughput tests
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Updates throughput test scripts to work (better) with MooreOnline testbench. Also updates the algorithm grouping for the "flame bar" plot made from the timing table.
Goes with lhcb-core/LHCbNightlyConf!1212 (merged) and lhcb/MooreOnline!429 (merged)