tests: chimera sequence on TRG

This sequence should not be segmented on IGL, but reported as AMBIGUOUS on TRG.

algo/tests/chimera.should_get

+!LAUNCH: ../../vidjil -A -uU -g ../../germline ../../data/chimera-trg.fa
+
+$ Do not segment on IGL by chance
+1:IGL .* 0   
+
+$ Report the sequence as AMBIGUOUS
+1:UNSEG ambiguous .* 1

data/chimera-trg.fa

+>leu-trg-chimera
+ATTCTGGGGTCTATTACTGTGCCACCTGGGACAGGCCCCGGC
+AAGATATTTGCTGAAGGGACTAAGCTCATAGTAACTTCGCCT
+GGTAAGGAAGGCCCCACAGCGTCTTCTGTACTATGACGTCTC
+CACCGCAAGGGATGTGTTGGAATCAGGACTCAGTCCAGGAAA
+GTATTATACTCATACACCCAGGAGGTGGAGCTGGATATTGAG
+ACTGCAAAATCTAATTGAAAATGATTCTGGG