MET Reco: workaround to avoid unmerged CA

Thomas Streblerrequested to merge
tstreble/athena:fix-metreco-ca into 23.0

Work towards making !61689 (merged) pass. This time fixing MET reconstruction. Similar to !61828 (merged)

FYI @tadej @tbold @fwinkl @schaarsc @mswiatlo

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