Identify and list Amb alleles from pangolin_report output file.

[frankambrosio3]

In the outputs of Titan the pangolin_report file reports the number of ambiguous alleles (Amb allele). The list of the particular alleles which are ambiguous is contained in a temp file. This file may be retained with the --no-temp flag.

Use this flag and create a new workflow output to report the list of ambiguous alleles in a terra data table.