new run3 L1muon chains (ATR-23227)

Daniele Zanzirequested to merge
dzanzi/athena:ATR-23227_v3_dzanzi into master

Addition of HLT muon chains seeded from the new run3 L1 thresholds. Tagging @nakahama @cdiez @lyubushk @abarton @markowen @khoo @masato

Edited by Daniele Zanzi

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