pathogen/files: Add TB intermediate files

Noticed in https://github.com/nextstrain/nextstrain.org/pull/1257#pullrequestreview-3445177925 that we are intentionally excluding TB files https://github.com/nextstrain/nextstrain.org/blob/da6cb7babfdf643b097e6ac39531842adcb5fffb/resourceIndexer/coreStagingS3.js#L256-L257 Since the TB workflow is now fully automated, we can revisit this. How much of TB's intermediate files do we want to surface on this page? 1. List _all_ available files. - Since TB has TBProfiler and snippy results _per sample_, this might be too much. 2. List only metadata.tsv and VCF file per build, similar to how ncov has regional build files . - This is not available yet, we would need to update the TB workflow to upload these intermediate files to S3. 3. Continue to exclude TB from the page.