Generate Terra table insert

[tomkinsc]

In addition to creating a README.txt file when a run has finished uploading, the upload script should have an option to generate a TSV that can be used to add a row to a Terra table with the run ID, the gs:// path to the finished tarball, and an array of placeholders for sample sheets.

The resulting format should be something like this:

entity:flowcell_id	flowcell_tar	samplesheets
YYMMDD_InstrumentID_RunNumber_FlowCellID	gs://bucket/path/to/YYMMDD_InstrumentID_RunNumber_FlowCellID.tar.gz	["lane1_samplesheet_placeholder","lane2_samplesheet_placeholder"]

The table name (flowcell in the above example) should be configurable, with a default value of "flowcell". There should be a toggle in the script to (en|dis)able this feature (enabled by default?).

If the service worker account used for gcloud auth activate-service-account has write access to a Terra workspace, the script could even make a POST request to automatically import the tsv via the API function:

• /api/workspaces/{workspaceNamespace}/{workspaceName}/importEntities