egammaAlgs and ThinningUtils: thin TRT standalone tracks neither used by e/gamma nor taus
Hello,
This MR adds a new AthReentrantAlgorithm to thin the TRT standalone tracks neither used by e/gamma nor taus. The functionality was initially implemented in egammaTrackSlimmer, but as discussed in !40605 (closed) , it has been moved to a dedicated algorithm in order to include taus (ATLTAU-1770). The number of thinned InDetTrackParticles tracks is limited, but this algorithm consumes little CPU, so it might still be worth it.
A few AODFlags have been introduced to control the thinning.
Tagging @christos , @jmaurer and @jpoveda for scrutiny.
Cheers, Bertrand