[EMCAL-795]: Add protection for TRUs when cheking HW address

[jokonig]

• Minor altro errors are observed with the error "CHANNEL_ORDER"
• The altro index for TRUs does not exist and therefore, the altro index is uninitialized
• Hence, no check for the altro index has to be done for TRUs
• TRUs correpond to fec==0 in each branch. The Altro Index check is therefore only performed for fec > 0

[github-actions]

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[mfasDa]

Looks good.

For the record: We need to exclude the check of the ALTRO index for Fake-ALTRO FECs (TRU) since the ALTRO index is undefined there. Fake-ALTRO FECs are always in FEC ID 0.