Remove usage of __getattr__ in TrackRecoConfig
As discussed in !72727 (comment 8317119) the usage of __getattr__
in the tracking reconstruction configs should be avoided. This is taken care of here and has been tested to work as expected.
Will wait for !72727 (merged) to be merged to rebase on top, as this introduces a few other occurrences to update as well.
The ITk config will be updated separately in main due to some conflicts.
FYI @maszyman