Don't add run_id to analysis output dir

[dfornika]

The BCCDC-PHL/FluViewer_nf pipeline has been updated to automatically write outputs into a directory named using the sequencing run ID. In this tool we're already putting the outputs in a directory named using the sequencing run ID, so this results in one extra layer of directories, where the run ID is repeated.

Remove the run ID from the analysis output dir in this tool.