FT: Account for unexpected (corrupt) data

Recopying the item list in LHCb!3735 (merged):

• if a bank is sent with no header (would create a segfault) (already done in !961 (merged));
• if a bank does not have an even size (already done in !961 (merged));
• if a bank has an absurd number of clusters (> number of links * maximum number of clusters per link);
• if a link is larger than 24 (would create a segfault);
• if a link sent more than 24 clusters.

Bonus:

• [] Create error counters