wga bam files in Jbrowse config

currently, the populate-jbrowse handles adding the paf files from genome_alignments but doesn't seem to add tracks for the associated bam files. Although the two files contain similar data, JBrowse2 only uses indexing with respect to the bam files, meaning that they are much faster to load when just looking at a linear genome view. So, I think we ought to make both available as tracks.
