This merge request merges nearly all the changes that were made to the 21.0 branch between the release
[release/21.0.102](https://gitlab.cern.ch/atlas/athena/tags/release/21.0.102) and the previous
release [release/21.0.101](https://gitlab.cern.ch/atlas/athena/tags/release/21.0.101).

Below is a full list of merge requests that were accepted between these two tags:
 * !26597 : upload to r21.0 and r21.1 GlobalMonitoring scripts used during 2018 pp and HI runs
 * !26617 : Support running over input files that don't contain the legacy EventInfo
 * !25956 : Account for cosmics timing offset in pixel digitization (2015 tune)
 * !26578 : Sweeping !26548 from master to 21.0.
 * !26518 : Sweeping !26444 from master to 21.0.
 * !26126 : InDetPerformanceMonitoring
 * !26396 : Sweeping fixes from master related to FastCaloSim
 * !26398 : Monopole: Handle fractionally charged particles in 21.0
 * !26400 : Fix for ATLHI-288
 * !24343 : Add functionality to store auxiliary inform...