[RTA/DPA BW tests]: Unpack ODIN from correct RawEventLocation in bandwidth test analysis script

Goes with lhcb/Moore!3031 (merged)

Thanks to @sesen, we found a bit of incorrect raw event unpacking in one of the bandwidth tests' analysis scripts, which was being hidden by the absence of the alg being added in the above Moore MR. Once that alg is re-added to the Moore control flow, this script will break, so we need to fix the incorrect unpacking to avoid that.