ATR-28617: Rename FS LRT sequence to avoid clash with FS VSI

In pure CA trigger configuration, the unconventional tracking FS VSI chain was losing its VSI algorithm (ATR-28617). This seems to be traced to a sequence name overlap where the FS LRT chains erroneously generated a duplicate sequence called 'UncFSVSIreco' that did not contain this alg. Renaming this sequence restores the correct behaviour in a menu containing both sets of chains.

Noting that this seems to be a possible vulnerability, likely in the control flow generation, where non-unique sequence names could interfere across the menu. If there is a clear solution (@fpastore might be able to advise?) it could be integrated into this MR, otherwise would be a priority to follow up.